☰

YouTube JS Engine Tamer

To enhance YouTube performance by modifying YouTube JS Engine

目前為 2023-09-22 提交的版本，檢視 最新版本。

  1. // ==UserScript==
  2. // @name        YouTube JS Engine Tamer
  3. // @namespace   UserScripts
  4. // @match       https://www.youtube.com/*
  5. // @version     0.4.15
  6. // @license     MIT
  7. // @author      CY Fung
  8. // @icon        https://github.com/cyfung1031/userscript-supports/raw/main/icons/yt-engine.png
  9. // @description To enhance YouTube performance by modifying YouTube JS Engine
  10. // @grant       none
  11. // @run-at      document-start
  12. // @unwrap
  13. // @inject-into page
  14. // @allFrames   true
  15. // ==/UserScript==
  16.  
  17. (() => {
  18.  
  19.   const NATIVE_CANVAS_ANIMATION = false; // for #cinematics
  20.   const FIX_schedulerInstanceInstance_ = true;
  21.   const FIX_yt_player = true;
  22.   const FIX_Animation_n_timeline = true;
  23.   const NO_PRELOAD_GENERATE_204 = false;
  24.   const CHANGE_appendChild = true;
  25.  
  26.   const FIX_error_many_stack = true; // should be a bug caused by uBlock Origin
  27.   // const FIX_error_many_stack_keepAliveDuration = 200; // ms
  28.   // const FIX_error_many_stack_keepAliveDuration_check_if_n_larger_than = 8;
  29.  
  30.   const FIX_Iframe_NULL_SRC = true;
  31.  
  32.   const IGNORE_bindAnimationForCustomEffect = true; // prevent `v.bindAnimationForCustomEffect(this);` being executed
  33.  
  34.   /*
  35.   window.addEventListener('edm',()=>{
  36.     let p = [...this.onerror.errorTokens][0].token; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  37.   });
  38.  
  39.   window.addEventListener('edn',()=>{
  40.     let p = [...this.onerror.errorTokens][0].token+"X"; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  41.   });
  42.   window.addEventListener('edr',()=>{
  43.     let p = '123'; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  44.   });
  45. */
  46.  
  47.  
  48.   const prepareLogs = [];
  49.  
  50.   const skipAdsDetection = new Set(['/robots.txt', '/live_chat', '/live_chat_replay']);
  51.  
  52.   let winError00 = window.onerror;
  53.  
  54.   let fix_error_many_stack_state = !FIX_error_many_stack ? 0 : skipAdsDetection.has(location.pathname) ? 2 : 1;
  55.  
  56.   if (!JSON || !('parse' in JSON)) fix_error_many_stack_state = 0;
  57.  
  58.   ; FIX_Iframe_NULL_SRC && (() => {
  59.  
  60.     let emptyBlobUrl = URL.createObjectURL(new Blob([], { type: 'text/html' }));
  61.     const lcOpt = { sensitivity: 'base' };
  62.     document.createElement24 = document.createElement;
  63.     document.createElement = function (t) {
  64.       if (typeof t === 'string' && t.length === 6) {
  65.         if (t.localeCompare('iframe', undefined, lcOpt) === 0) {
  66.           let p = this.createElement24(t);
  67.           p.src = emptyBlobUrl; // avoid iframe is appended to DOM without any url
  68.           return p;
  69.         }
  70.       }
  71.       return this.createElement24.apply(this, arguments);
  72.     };
  73.  
  74.   })();
  75.  
  76.   ; fix_error_many_stack_state === 1 && (() => {
  77.  
  78.  
  79.     let p1 = winError00;
  80.  
  81.     let stackNeedleDetails = null;
  82.  
  83.     Object.defineProperty(Object.prototype, 'matchAll', {
  84.       get() {
  85.         stackNeedleDetails = this;
  86.         return true;
  87.       },
  88.       enumerable: true,
  89.       configurable: true
  90.     });
  91.  
  92.     try {
  93.       JSON.parse("{}");
  94.     } catch (e) {
  95.       console.warn(e)
  96.       fix_error_many_stack_state = 0;
  97.     }
  98.  
  99.     delete Object.prototype['matchAll'];
  100.  
  101.     let p2 = window.onerror;
  102.  
  103.     window.onerror = p1;
  104.  
  105.     if (fix_error_many_stack_state === 0) return;
  106.  
  107.     if (stackNeedleDetails) {
  108.       JSON.parse.stackNeedleDetails = stackNeedleDetails;
  109.       stackNeedleDetails.matchAll = true;
  110.     }
  111.  
  112.     if (p1 === p2) return (fix_error_many_stack_state = 0);
  113.  
  114.     // p1!==p2
  115.     fix_error_many_stack_state = !stackNeedleDetails ? 4 : 3;
  116.  
  117.   })();
  118.  
  119.   ; fix_error_many_stack_state === 2 && (() => {
  120.  
  121.  
  122.     let p1 = winError00;
  123.  
  124.     let objectPrune = null;
  125.     let stackNeedleDetails = null;
  126.  
  127.     Object.defineProperty(Function.prototype, 'findOwner', {
  128.       get() {
  129.         objectPrune = this;
  130.         return this._findOwner;
  131.       },
  132.       set(nv) {
  133.         this._findOwner = nv;
  134.         return true;
  135.       },
  136.       enumerable: true,
  137.       configurable: true
  138.     });
  139.  
  140.     Object.defineProperty(Object.prototype, 'matchAll', {
  141.       get() {
  142.         stackNeedleDetails = this;
  143.         return true;
  144.       },
  145.       enumerable: true,
  146.       configurable: true
  147.     });
  148.  
  149.     try {
  150.       JSON.parse("{}");
  151.     } catch (e) {
  152.       console.warn(e)
  153.       fix_error_many_stack_state = 0;
  154.     }
  155.  
  156.     delete Function.prototype['findOwner'];
  157.     delete Object.prototype['matchAll'];
  158.  
  159.     let p2 = window.onerror;
  160.  
  161.     if (p1 !== p2) return (fix_error_many_stack_state = 4); // p1 != p2
  162.  
  163.     if (fix_error_many_stack_state == 0) return;
  164.  
  165.     // the following will only execute when Brave's scriptlets.js is executed.
  166.  
  167.     prepareLogs.push("fix_error_many_stack_state NB")
  168.  
  169.     if (stackNeedleDetails) {
  170.       stackNeedleDetails.pattern = null;
  171.       stackNeedleDetails.re = null;
  172.       stackNeedleDetails.expect = null;
  173.       stackNeedleDetails.matchAll = true;
  174.     }
  175.  
  176.     if (objectPrune) {
  177.       objectPrune.findOwner = objectPrune.mustProcess = objectPrune.logJson = () => { }
  178.       delete objectPrune._findOwner;
  179.     }
  180.  
  181.     fix_error_many_stack_state = 3;
  182.     JSON.parse.stackNeedleDetails = stackNeedleDetails;
  183.     JSON.parse.objectPrune = objectPrune;
  184.  
  185.   })();
  186.  
  187.   ; fix_error_many_stack_state === 3 && (() => {
  188.  
  189.  
  190.     let p1 = winError00;
  191.  
  192.     try {
  193.       JSON.parse("{}");
  194.     } catch (e) {
  195.       console.warn(e)
  196.       fix_error_many_stack_state = 0;
  197.     }
  198.  
  199.     let p2 = window.onerror;
  200.  
  201.     if (p1 === p2) return;
  202.  
  203.     window.onerror = p1;
  204.  
  205.     if (fix_error_many_stack_state === 0) return;
  206.  
  207.     fix_error_many_stack_state = 4; // p1 != p2
  208.  
  209.  
  210.   })();
  211.  
  212.   fix_error_many_stack_state === 4 && (() => {
  213.  
  214.     // the following will only execute when Brave's scriptlets.js is executed.
  215.  
  216.     prepareLogs.push("fix_error_many_stack_state AB")
  217.  
  218.     JSON.parseProxy = JSON.parse;
  219.  
  220.     JSON.parse = ((parse) => {
  221.  
  222.       parse = parse.bind(JSON); // get a new instance of the current JSON.parse
  223.       return function (text, reviver) {
  224.         const onerror = window.onerror;
  225.         window.onerror = null;
  226.         let r;
  227.         try {
  228.           r = parse(...arguments);
  229.         } catch (e) {
  230.           r = e;
  231.         }
  232.         window.onerror = onerror;
  233.         if (r instanceof Error) {
  234.           throw r;
  235.         }
  236.         return r;
  237.       }
  238.  
  239.     })(JSON.parse);
  240.  
  241.  
  242.   })();
  243.  
  244.  
  245.  
  246.   // ================================================ 0.4.5 ================================================
  247.  
  248.  
  249.   // ; (() => {
  250.  
  251.   //   if (FIX_error_many_stack && self instanceof Window) {
  252.   //     // infinite stack due to matchesStackTrace inside objectPrune of AdsBlock
  253.  
  254.   //     const pdK = Object.getOwnPropertyDescriptor(window, 'onerror');
  255.   //     if (!pdK || (pdK.get && pdK.configurable)) {
  256.  
  257.   //     } else {
  258.   //       return;
  259.   //     }
  260.  
  261.   //     let unsupportErrorFix = false;
  262.  
  263.   //     let firstHook = true;
  264.   //     let busy33 = false;
  265.  
  266.   //     let state = 0;
  267.  
  268.   //     if (pdK) {
  269.   //       delete window['onerror'];
  270.   //     }
  271.  
  272.   //     const pd = {
  273.   //       get() {
  274.   //         const stack = (new Error()).stack;
  275.   //         // targetStack = stack;
  276.   //         let isGetExceptionToken = stack.indexOf('getExceptionToken') >= 0;
  277.   //         state = isGetExceptionToken ? 1 : 0;
  278.   //         delete Window.prototype['onerror'];
  279.   //         let r = pdK ? pdK.get.call(this) : this.onerror;
  280.   //         Object.defineProperty(Window.prototype, 'onerror', pd);
  281.   //         //        console.log('onerror get', r)
  282.   //         return r;
  283.   //       },
  284.   //       set(nv) {
  285.   //         const stack = (new Error()).stack;
  286.   //         let isGetExceptionToken = stack.indexOf('getExceptionToken') >= 0;
  287.   //         state = state === 1 && isGetExceptionToken ? 2 : 0;
  288.   //         /** @type {string?} */
  289.   //         let sToken = null;
  290.   //         if (unsupportErrorFix || busy33) {
  291.  
  292.   //         } else if (typeof nv === 'function' && state === 2) {
  293.   //           if (firstHook) {
  294.   //             firstHook = false;
  295.   //             console.groupCollapsed('Infinite onerror Bug Found');
  296.   //             console.log(location.href);
  297.   //             console.log(stack);
  298.   //             console.log(nv);
  299.   //             console.groupEnd();
  300.   //           }
  301.   //           let _token = null;
  302.   //           busy33 = true;
  303.   //           String.prototype.includes76 = String.prototype.includes;
  304.   //           String.prototype.includes = function (token) {
  305.   //             _token = token;
  306.   //             return true;
  307.   //           }
  308.   //           nv('token');
  309.   //           String.prototype.includes = String.prototype.includes76;
  310.   //           sToken = _token;
  311.   //           busy33 = false;
  312.   //           if (typeof sToken !== 'string') {
  313.   //             unsupportErrorFix = true;
  314.   //           }
  315.   //         }
  316.   //         delete Window.prototype['onerror'];
  317.   //         if (typeof sToken === 'string' && sToken.length > 1) {
  318.   //           /** @type {string} */
  319.   //           const token = sToken;
  320.   //           /** @type {OnErrorEventHandler & {errorTokens: Set<string>?} } */
  321.   //           const currentOnerror = pdK ? pdK.get.call(this) : this.onerror;
  322.  
  323.   //           const now = Date.now();
  324.   //           const tokenEntry = {
  325.   //             token,
  326.   //             expired: now + FIX_error_many_stack_keepAliveDuration
  327.   //           }
  328.   //           /** @typedef {typeof tokenEntry} TokenEntry */
  329.  
  330.   //           /** @type {Set<TokenEntry>} */
  331.   //           const errorTokens = currentOnerror.errorTokens;
  332.  
  333.   //           if (errorTokens) {
  334.   //             if (errorTokens.size > FIX_error_many_stack_keepAliveDuration_check_if_n_larger_than) {
  335.   //               for (const entry of errorTokens) {
  336.   //                 if (entry.expired < now) {
  337.   //                   errorTokens.delete(entry);
  338.   //                 }
  339.   //               }
  340.   //             }
  341.   //             errorTokens.add(tokenEntry)
  342.   //           } else {
  343.   //             /** @type {Set<TokenEntry>} */
  344.   //             const errorTokens = new Set([tokenEntry]);
  345.   //             /** @type {OnErrorEventHandler & {errorTokens: Set<string>} } */
  346.   //             const newOnerror = ((oe) => {
  347.   //               const r = function (msg, ...args) {
  348.   //                 if (typeof msg === 'string' && errorTokens.size > 0) {
  349.   //                   for (const entry of errorTokens) {
  350.   //                     if (msg.includes(entry.token)) return true;
  351.   //                   }
  352.   //                 }
  353.   //                 if (typeof oe === 'function') {
  354.   //                   return oe.apply(this, arguments);
  355.   //                 }
  356.   //               };
  357.   //               r.errorTokens = errorTokens;
  358.   //               return r;
  359.   //             })(currentOnerror);
  360.  
  361.   //             if (pdK && pdK.set) pdK.set.call(this, newOnerror);
  362.   //             else this.onerror = newOnerror;
  363.   //           }
  364.   //         } else {
  365.   //           if (pdK && pdK.set) pdK.set.call(this, nv);
  366.   //           else this.onerror = nv;
  367.   //         }
  368.   //         Object.defineProperty(Window.prototype, 'onerror', pd);
  369.  
  370.   //         // console.log('onerror set', nv)
  371.   //         return true;
  372.   //       },
  373.   //       enumerable: true,
  374.   //       configurable: true
  375.   //     }
  376.  
  377.   //     Object.defineProperty(Window.prototype, 'onerror', pd);
  378.  
  379.  
  380.   //   }
  381.  
  382.  
  383.   // })();
  384.  
  385.  
  386.  
  387.   // ================================================ 0.4.5 ================================================
  388.  
  389.  
  390.   // << if FIX_yt_player >>
  391.  
  392.   // credit to @nopeless (https://greasyfork.org/scripts/471489-youtube-player-perf/)
  393.   const PERF_471489_ = true;
  394.   // PERF_471489_ is not exactly the same to Youtube Player perf v0.7
  395.   // This script uses a much gentle way to tamer the JS engine instead.
  396.  
  397.   // << end >>
  398.  
  399.   const steppingScaleN = 200; // transform: scaleX(k/N); 0<k<N
  400.  
  401.   const Promise = (async () => { })().constructor;
  402.  
  403.   let isMainWindow = false;
  404.   try {
  405.     isMainWindow = window.document === window.top.document
  406.   } catch (e) { }
  407.  
  408.   let NO_PRELOAD_GENERATE_204_BYPASS = NO_PRELOAD_GENERATE_204 ? false : true;
  409.  
  410.   const onRegistryReady = (callback) => {
  411.     if (typeof customElements === 'undefined') {
  412.       if (!('__CE_registry' in document)) {
  413.         // https://github.com/webcomponents/polyfills/
  414.         Object.defineProperty(document, '__CE_registry', {
  415.           get() {
  416.             // return undefined
  417.           },
  418.           set(nv) {
  419.             if (typeof nv == 'object') {
  420.               delete this.__CE_registry;
  421.               this.__CE_registry = nv;
  422.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  423.             }
  424.             return true;
  425.           },
  426.           enumerable: false,
  427.           configurable: true
  428.         })
  429.       }
  430.       let eventHandler = (evt) => {
  431.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  432.         const f = callback;
  433.         callback = null;
  434.         eventHandler = null;
  435.         f();
  436.       };
  437.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  438.     } else {
  439.       callback();
  440.     }
  441.   };
  442.  
  443.   const getZq = (_yt_player) => {
  444.  
  445.     const w = 'Zq';
  446.  
  447.     let arr = [];
  448.  
  449.     for (const [k, v] of Object.entries(_yt_player)) {
  450.  
  451.       const p = typeof v === 'function' ? v.prototype : 0;
  452.       if (p
  453.         && typeof p.start === 'function' && p.start.length === 0
  454.         && typeof p.isActive === 'function' && p.isActive.length === 0
  455.         && typeof p.stop === 'function' && p.stop.length === 0
  456.         && !p.isComplete && !p.getStatus && !p.getResponseHeader && !p.getLastError
  457.         && !p.send && !p.abort
  458.         && !p.sample && !p.initialize && !p.fail && !p.getName
  459.         // && !p.dispose && !p.isDisposed
  460.  
  461.       ) {
  462.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  463.  
  464.  
  465.       }
  466.  
  467.     }
  468.  
  469.     if (arr.length === 0) {
  470.  
  471.       console.warn(`Key does not exist. [${w}]`);
  472.     } else {
  473.  
  474.       console.log(`[${w}]`, arr);
  475.       return arr[0];
  476.     }
  477.  
  478.  
  479.  
  480.  
  481.   }
  482.  
  483.  
  484.   const getVG = (_yt_player) => {
  485.     const w = 'VG';
  486.  
  487.     let arr = [];
  488.  
  489.     for (const [k, v] of Object.entries(_yt_player)) {
  490.  
  491.       const p = typeof v === 'function' ? v.prototype : 0;
  492.       if (p
  493.         && typeof p.show === 'function' && p.show.length === 1
  494.         && typeof p.hide === 'function' && p.hide.length === 0
  495.         && typeof p.stop === 'function' && p.stop.length === 0) {
  496.  
  497.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  498.  
  499.       }
  500.  
  501.     }
  502.  
  503.  
  504.     if (arr.length === 0) {
  505.  
  506.       console.warn(`Key does not exist. [${w}]`);
  507.     } else {
  508.  
  509.       console.log(`[${w}]`, arr);
  510.       return arr[0];
  511.     }
  512.  
  513.  
  514.  
  515.   }
  516.  
  517.  
  518.   const getzo = (_yt_player) => {
  519.     const w = 'zo';
  520.  
  521.     let arr = [];
  522.  
  523.     for (const [k, v] of Object.entries(_yt_player)) {
  524.  
  525.       if (
  526.         typeof v === 'function' && v.length === 3 && k.length < 3
  527.         && (v + "").includes("a.style[b]=c")
  528.       ) {
  529.  
  530.         arr.push(k);
  531.  
  532.       }
  533.  
  534.     }
  535.  
  536.  
  537.     if (arr.length === 0) {
  538.  
  539.       console.warn(`Key does not exist. [${w}]`);
  540.     } else {
  541.  
  542.       console.log(`[${w}]`, arr);
  543.       return arr[0];
  544.     }
  545.  
  546.   }
  547.  
  548.   const addProtoToArr = (parent, key, arr) => {
  549.  
  550.  
  551.     let isChildProto = false;
  552.     for (const sr of arr) {
  553.       if (parent[key].prototype instanceof parent[sr]) {
  554.         isChildProto = true;
  555.         break;
  556.       }
  557.     }
  558.  
  559.     if (isChildProto) return;
  560.  
  561.     arr = arr.filter(sr => {
  562.       if (parent[sr].prototype instanceof parent[key]) {
  563.         return false;
  564.       }
  565.       return true;
  566.     });
  567.  
  568.     arr.push(key);
  569.  
  570.     return arr;
  571.  
  572.  
  573.   }
  574.  
  575.   const getuG = (_yt_player) => {
  576.  
  577.     const w = 'uG';
  578.  
  579.     let arr = [];
  580.  
  581.     for (const [k, v] of Object.entries(_yt_player)) {
  582.  
  583.  
  584.       const p = typeof v === 'function' ? v.prototype : 0;
  585.  
  586.       if (p
  587.         && typeof p.createElement === 'function' && p.createElement.length === 2
  588.         && typeof p.detach === 'function' && p.detach.length === 0
  589.         && typeof p.update === 'function' && p.update.length === 1
  590.         && typeof p.updateValue === 'function' && p.updateValue.length === 2
  591.       ) {
  592.  
  593.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  594.  
  595.       }
  596.  
  597.     }
  598.  
  599.  
  600.  
  601.  
  602.  
  603.     if (arr.length === 0) {
  604.  
  605.       console.warn(`Key does not exist. [${w}]`);
  606.     } else {
  607.  
  608.       console.log(`[${w}]`, arr);
  609.       return arr[0];
  610.     }
  611.  
  612.   }
  613.  
  614.  
  615.  
  616.   // << if FIX_schedulerInstanceInstance_ >>
  617.  
  618.   let idleFrom = Date.now() + 2700;
  619.   let slowMode = false;
  620.  
  621.   let ytEvented = false;
  622.  
  623.  
  624.   function setupEvents() {
  625.  
  626.     document.addEventListener('yt-navigate', () => {
  627.  
  628.       ytEvented = true;
  629.       slowMode = false;
  630.       idleFrom = Date.now() + 2700;
  631.  
  632.     });
  633.     document.addEventListener('yt-navigate-start', () => {
  634.  
  635.       ytEvented = true;
  636.       slowMode = false;
  637.       idleFrom = Date.now() + 2700;
  638.  
  639.     });
  640.  
  641.     document.addEventListener('yt-page-type-changed', () => {
  642.  
  643.       ytEvented = true;
  644.       slowMode = false;
  645.       idleFrom = Date.now() + 1700;
  646.  
  647.     });
  648.  
  649.  
  650.     document.addEventListener('yt-player-updated', () => {
  651.  
  652.       ytEvented = true;
  653.       slowMode = false;
  654.       idleFrom = Date.now() + 1700;
  655.  
  656.     });
  657.  
  658.  
  659.     document.addEventListener('yt-page-data-fetched', () => {
  660.  
  661.       ytEvented = true;
  662.       slowMode = false;
  663.       idleFrom = Date.now() + 1700;
  664.  
  665.     });
  666.  
  667.     document.addEventListener('yt-navigate-finish', () => {
  668.  
  669.       ytEvented = true;
  670.       slowMode = false;
  671.       let t = Date.now() + 700;
  672.       if (t > idleFrom) idleFrom = t;
  673.  
  674.     });
  675.  
  676.     document.addEventListener('yt-page-data-updated', () => {
  677.  
  678.       ytEvented = true;
  679.       slowMode = false;
  680.       let t = Date.now() + 700;
  681.       if (t > idleFrom) idleFrom = t;
  682.  
  683.     });
  684.  
  685.     document.addEventListener('yt-watch-comments-ready', () => {
  686.  
  687.       ytEvented = true;
  688.       slowMode = false;
  689.       let t = Date.now() + 700;
  690.       if (t > idleFrom) idleFrom = t;
  691.  
  692.     });
  693.   }
  694.  
  695.  
  696.   // << end >>
  697.  
  698.   const cleanContext = async (win) => {
  699.     const waitFn = requestAnimationFrame; // shall have been binded to window
  700.     try {
  701.       let mx = 16; // MAX TRIAL
  702.       const frameId = 'vanillajs-iframe-v1';
  703.       /** @type {HTMLIFrameElement | null} */
  704.       let frame = document.getElementById(frameId);
  705.       let removeIframeFn = null;
  706.       if (!frame) {
  707.         frame = document.createElement('iframe');
  708.         frame.id = frameId;
  709.         const blobURL = typeof webkitCancelAnimationFrame === 'function' ? (frame.src = URL.createObjectURL(new Blob([], { type: 'text/html' }))) : null; // avoid Brave Crash
  710.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  711.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  712.         n.appendChild(frame);
  713.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  714.         const root = document.documentElement;
  715.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  716.         if (blobURL) Promise.resolve().then(() => URL.revokeObjectURL(blobURL));
  717.  
  718.         removeIframeFn = (setTimeout) => {
  719.           const removeIframeOnDocumentReady = (e) => {
  720.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  721.             win = null;
  722.             const m = n;
  723.             n = null;
  724.             setTimeout(() => m.remove(), 200);
  725.           }
  726.           if (document.readyState !== 'loading') {
  727.             removeIframeOnDocumentReady();
  728.           } else {
  729.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  730.           }
  731.         }
  732.       }
  733.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  734.       const fc = frame.contentWindow;
  735.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  736.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, requestIdleCallback, getComputedStyle } = fc;
  737.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, requestIdleCallback, getComputedStyle };
  738.       for (let k in res) res[k] = res[k].bind(win); // necessary
  739.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  740.       res.animate = fc.HTMLElement.prototype.animate;
  741.       return res;
  742.     } catch (e) {
  743.       console.warn(e);
  744.       return null;
  745.     }
  746.   };
  747.  
  748.  
  749.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  750.  
  751.   cleanContext(window).then(__CONTEXT__ => {
  752.     if (!__CONTEXT__) return null;
  753.  
  754.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate, requestIdleCallback, getComputedStyle } = __CONTEXT__;
  755.  
  756.  
  757.  
  758.     let rafPromiseForTickers = null;
  759.  
  760.     const getRafPromiseForTickers = () => rafPromiseForTickers || (rafPromiseForTickers = new Promise(resolve => {
  761.       requestAnimationFrame(hRes => {
  762.         rafPromiseForTickers = null;
  763.         resolve(hRes);
  764.       });
  765.     }));
  766.  
  767.     const getForegroundPromise = () => {
  768.       if (document.visibilityState === 'visible') {
  769.         return Promise.resolve();
  770.       } else {
  771.         return getRafPromiseForTickers();
  772.       }
  773.     };
  774.  
  775.     NO_PRELOAD_GENERATE_204_BYPASS || promiseForCustomYtElementsReady.then(() => {
  776.       setTimeout(() => {
  777.         NO_PRELOAD_GENERATE_204_BYPASS = true;
  778.       }, 1270);
  779.     });
  780.  
  781.     const promiseForTamerTimeout = new Promise(resolve => {
  782.       promiseForCustomYtElementsReady.then(() => {
  783.         customElements.whenDefined('ytd-app').then(() => {
  784.           setTimeout(resolve, 1200);
  785.         });
  786.       });
  787.       setTimeout(resolve, 3000);
  788.     });
  789.  
  790.  
  791.     class RAFHub {
  792.       constructor() {
  793.         /** @type {number} */
  794.         this.startAt = 8170;
  795.         /** @type {number} */
  796.         this.counter = 0;
  797.         /** @type {number} */
  798.         this.rid = 0;
  799.         /** @type {Map<number, FrameRequestCallback>} */
  800.         this.funcs = new Map();
  801.         const funcs = this.funcs;
  802.         /** @type {FrameRequestCallback} */
  803.         this.bCallback = this.mCallback.bind(this);
  804.         this.pClear = () => funcs.clear();
  805.       }
  806.       /** @param {DOMHighResTimeStamp} highResTime */
  807.       mCallback(highResTime) {
  808.         this.rid = 0;
  809.         Promise.resolve().then(this.pClear);
  810.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  811.       }
  812.       /** @param {FrameRequestCallback} f */
  813.       request(f) {
  814.         if (this.counter > 1e9) this.counter = 9;
  815.         let cid = this.startAt + (++this.counter);
  816.         this.funcs.set(cid, f);
  817.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  818.         return cid;
  819.       }
  820.       /** @param {number} cid */
  821.       cancel(cid) {
  822.         cid = +cid;
  823.         if (cid > 0) {
  824.           if (cid <= this.startAt) {
  825.             return cancelAnimationFrame(cid);
  826.           }
  827.           if (this.rid > 0) {
  828.             this.funcs.delete(cid);
  829.             if (this.funcs.size === 0) {
  830.               cancelAnimationFrame(this.rid);
  831.               this.rid = 0;
  832.             }
  833.           }
  834.         }
  835.       }
  836.     }
  837.  
  838.  
  839.  
  840.     NATIVE_CANVAS_ANIMATION && (() => {
  841.  
  842.       HTMLCanvasElement.prototype.animate = animate;
  843.  
  844.       let cid = setInterval(() => {
  845.         HTMLCanvasElement.prototype.animate = animate;
  846.       }, 1);
  847.  
  848.       promiseForTamerTimeout.then(() => {
  849.         clearInterval(cid)
  850.       });
  851.  
  852.     })();
  853.  
  854.     CHANGE_appendChild && (() => {
  855.  
  856.       HTMLElement.prototype.appendChild73 = HTMLElement.prototype.appendChild;
  857.       HTMLElement.prototype.appendChild = function (a) {
  858.  
  859.         if (this instanceof HTMLElement) {
  860.           if (!NO_PRELOAD_GENERATE_204_BYPASS && document.head === this) {
  861.             for (let node = this.firstElementChild; node instanceof HTMLElement; node = node.nextElementSibling) {
  862.               if (node.nodeName === 'LINK' && node.rel === 'preload' && node.as === 'fetch' && !node.__m848__) {
  863.                 node.__m848__ = 1;
  864.                 node.rel = 'prefetch'; // see https://github.com/GoogleChromeLabs/quicklink
  865.               }
  866.             }
  867.           } else if (this.nodeName.startsWith('YT-')) { // yt-animated-rolling-number, yt-attributed-string
  868.             return this.appendChild73.apply(this, arguments);
  869.           }
  870.           if (a instanceof DocumentFragment) {
  871.             if (a.firstElementChild === null) return a;
  872.           }
  873.         }
  874.  
  875.         return this.appendChild73.apply(this, arguments)
  876.       }
  877.  
  878.  
  879.     })();
  880.  
  881.  
  882.     FIX_schedulerInstanceInstance_ && (async () => {
  883.  
  884.  
  885.       const schedulerInstanceInstance_ = await new Promise(resolve => {
  886.  
  887.         let cid = setInterval(() => {
  888.           let t = (((window || 0).ytglobal || 0).schedulerInstanceInstance_ || 0);
  889.           if (t) {
  890.  
  891.             clearInterval(cid);
  892.             resolve(t);
  893.           }
  894.         }, 1);
  895.         promiseForTamerTimeout.then(() => {
  896.           resolve(null)
  897.         });
  898.       });
  899.  
  900.       if (!schedulerInstanceInstance_) return;
  901.  
  902.  
  903.       if (!ytEvented) {
  904.         idleFrom = Date.now() + 2700;
  905.         slowMode = false; // integrity
  906.       }
  907.  
  908.       const checkOK = typeof schedulerInstanceInstance_.start === 'function' && !schedulerInstanceInstance_.start991 && !schedulerInstanceInstance_.stop && !schedulerInstanceInstance_.cancel && !schedulerInstanceInstance_.terminate && !schedulerInstanceInstance_.interupt;
  909.       if (checkOK) {
  910.  
  911.         schedulerInstanceInstance_.start991 = schedulerInstanceInstance_.start;
  912.  
  913.         let requestingFn = null;
  914.         let requestingArgs = null;
  915.         let requestingDT = 0;
  916.  
  917.         // let timerId = null;
  918.         const entries = [];
  919.         const f = function () {
  920.           requestingFn = this.fn;
  921.           requestingArgs = [...arguments];
  922.           requestingDT = Date.now();
  923.           entries.push({
  924.             fn: requestingFn,
  925.             args: requestingArgs,
  926.             t: requestingDT
  927.           });
  928.           // if (Date.now() < idleFrom) {
  929.           //   timerId = this.fn.apply(window, arguments);
  930.           // } else {
  931.           //   timerId = this.fn.apply(window, arguments);
  932.  
  933.           // }
  934.           // timerId = 12377;
  935.           return 12377;
  936.         }
  937.  
  938.  
  939.         const fakeFns = [
  940.           f.bind({ fn: requestAnimationFrame }),
  941.           f.bind({ fn: setInterval }),
  942.           f.bind({ fn: setTimeout }),
  943.           f.bind({ fn: requestIdleCallback })
  944.         ]
  945.  
  946.  
  947.  
  948.  
  949.         let timerResolve = null;
  950.         setInterval(() => {
  951.           timerResolve && timerResolve();
  952.           timerResolve = null;
  953.           if (!slowMode && Date.now() > idleFrom) slowMode = true;
  954.         }, 250);
  955.  
  956.         let mzt = 0;
  957.  
  958.         let fnSelectorProp = null;
  959.  
  960.         schedulerInstanceInstance_.start = function () {
  961.  
  962.           const mk1 = window.requestAnimationFrame
  963.           const mk2 = window.setInterval
  964.           const mk3 = window.setTimeout
  965.           const mk4 = window.requestIdleCallback
  966.  
  967.           const tThis = this['$$12378$$'] || this;
  968.  
  969.  
  970.           window.requestAnimationFrame = fakeFns[0]
  971.           window.setInterval = fakeFns[1]
  972.           window.setTimeout = fakeFns[2]
  973.           window.requestIdleCallback = fakeFns[3]
  974.  
  975.           fnSelectorProp = null;
  976.  
  977.  
  978.           tThis.start991.call(new Proxy(tThis, {
  979.             get(target, prop, receiver) {
  980.               if (prop === '$$12377$$') return true;
  981.               if (prop === '$$12378$$') return target;
  982.  
  983.               // console.log('get',prop)
  984.               return target[prop]
  985.             },
  986.             set(target, prop, value, receiver) {
  987.               // console.log('set', prop, value)
  988.  
  989.  
  990.               if (value >= 1 && value <= 4) fnSelectorProp = prop;
  991.               if (value === 12377 && fnSelectorProp) {
  992.  
  993.                 const originalSelection = target[fnSelectorProp];
  994.                 const timerIdProp = prop;
  995.  
  996.                 /*
  997.  
  998.  
  999.           case 1:
  1000.               var a = this.K;
  1001.               this.g = this.I ? window.requestIdleCallback(a, {
  1002.                   timeout: 3E3
  1003.               }) : window.setTimeout(a, ma);
  1004.               break;
  1005.           case 2:
  1006.               this.g = window.setTimeout(this.M, this.N);
  1007.               break;
  1008.           case 3:
  1009.               this.g = window.requestAnimationFrame(this.L);
  1010.               break;
  1011.           case 4:
  1012.               this.g = window.setTimeout(this.J, 0)
  1013.           }
  1014.  
  1015.           */
  1016.  
  1017.                 const doForegroundSlowMode = () => {
  1018.  
  1019.                   const tir = ++mzt;
  1020.                   const f = requestingArgs[0];
  1021.  
  1022.  
  1023.                   getForegroundPromise().then(() => {
  1024.  
  1025.  
  1026.                     new Promise(r => {
  1027.                       timerResolve = r
  1028.                     }).then(() => {
  1029.                       if (target[timerIdProp] === -tir) f();
  1030.                     });
  1031.  
  1032.                   })
  1033.  
  1034.                   target[fnSelectorProp] = 931;
  1035.                   target[prop] = -tir;
  1036.                 }
  1037.  
  1038.                 if (target[fnSelectorProp] === 2 && requestingFn === setTimeout) {
  1039.                   if (slowMode && !(requestingArgs[1] > 250)) {
  1040.  
  1041.                     doForegroundSlowMode();
  1042.  
  1043.                   } else {
  1044.                     target[prop] = setTimeout.apply(window, requestingArgs);
  1045.  
  1046.                   }
  1047.  
  1048.                 } else if (target[fnSelectorProp] === 3 && requestingFn === requestAnimationFrame) {
  1049.  
  1050.                   if (slowMode) {
  1051.  
  1052.                     doForegroundSlowMode();
  1053.  
  1054.                   } else {
  1055.                     target[prop] = requestAnimationFrame.apply(window, requestingArgs);
  1056.                   }
  1057.  
  1058.  
  1059.                 } else if (target[fnSelectorProp] === 4 && requestingFn === setTimeout && !requestingArgs[1]) {
  1060.  
  1061.                   const f = requestingArgs[0];
  1062.                   const tir = ++mzt;
  1063.                   Promise.resolve().then(() => {
  1064.                     if (target[timerIdProp] === -tir) f();
  1065.                   });
  1066.                   target[fnSelectorProp] = 930;
  1067.                   target[prop] = -tir;
  1068.  
  1069.                 } else if (target[fnSelectorProp] === 1 && (requestingFn === requestIdleCallback || requestingFn === setTimeout)) {
  1070.  
  1071.                   doForegroundSlowMode();
  1072.  
  1073.                 } else {
  1074.                   // target[prop] = timerId;
  1075.                   target[fnSelectorProp] = 0;
  1076.                   target[prop] = 0;
  1077.                 }
  1078.  
  1079.                 // *****
  1080.                 // console.log('[[set]]', slowMode , prop, value, `fnSelectorProp: ${originalSelection} -> ${target[fnSelectorProp]}`)
  1081.               } else {
  1082.  
  1083.                 target[prop] = value;
  1084.               }
  1085.               // console.log('set',prop,value)
  1086.               return true;
  1087.             }
  1088.           }));
  1089.  
  1090.           fnSelectorProp = null;
  1091.  
  1092.  
  1093.           window.requestAnimationFrame = mk1;
  1094.           window.setInterval = mk2
  1095.           window.setTimeout = mk3
  1096.           window.requestIdleCallback = mk4;
  1097.  
  1098.  
  1099.  
  1100.         }
  1101.  
  1102.         schedulerInstanceInstance_.start.toString = function () {
  1103.           return schedulerInstanceInstance_.start991.toString();
  1104.         }
  1105.  
  1106.         // const funcNames = [...(schedulerInstanceInstance_.start + "").matchAll(/[\(,]this\.(\w{1,2})[,\)]/g)].map(e => e[1]).map(prop => ({
  1107.         //   prop,
  1108.         //   value: schedulerInstanceInstance_[prop],
  1109.         //   type: typeof schedulerInstanceInstance_[prop]
  1110.  
  1111.         // }));
  1112.         // console.log('fcc', funcNames)
  1113.  
  1114.  
  1115.  
  1116.  
  1117.       }
  1118.     })();
  1119.  
  1120.  
  1121.     FIX_yt_player && (async () => {
  1122.  
  1123.  
  1124.  
  1125.       const rafHub = new RAFHub();
  1126.  
  1127.  
  1128.       const _yt_player = await new Promise(resolve => {
  1129.  
  1130.         let cid = setInterval(() => {
  1131.           let t = (((window || 0)._yt_player || 0) || 0);
  1132.           if (t) {
  1133.  
  1134.             clearInterval(cid);
  1135.             resolve(t);
  1136.           }
  1137.         }, 1);
  1138.  
  1139.         promiseForTamerTimeout.then(() => {
  1140.           resolve(null)
  1141.         });
  1142.  
  1143.       });
  1144.  
  1145.  
  1146.  
  1147.       if (!_yt_player || typeof _yt_player !== 'object') return;
  1148.  
  1149.  
  1150.  
  1151.       let keyZq = getZq(_yt_player);
  1152.       let keyVG = getVG(_yt_player);
  1153.       let buildVG = _yt_player[keyVG];
  1154.       let u = new buildVG({
  1155.         api: {},
  1156.         element: document.createElement('noscript'),
  1157.         api: {},
  1158.         hide: () => { }
  1159.       }, 250);
  1160.       const timeDelayConstructor = u.delay.constructor; // g.br
  1161.       // console.log(keyVG, u)
  1162.       // buildVG.prototype.show = function(){}
  1163.       // _yt_player[keyZq] = g.k
  1164.  
  1165.       if (!keyZq) return;
  1166.  
  1167.  
  1168.       const g = _yt_player
  1169.       let k = keyZq
  1170.  
  1171.       const gk = g[k];
  1172.       if (typeof gk !== 'function') return;
  1173.  
  1174.       let dummyObject = new gk;
  1175.       let nilFunc = () => { };
  1176.  
  1177.       let nilObj = {};
  1178.  
  1179.       // console.log(1111111111)
  1180.  
  1181.       let keyBoolD = '';
  1182.       let keyWindow = '';
  1183.       let keyFuncC = '';
  1184.       let keyCidj = '';
  1185.  
  1186.       for (const [t, y] of Object.entries(dummyObject)) {
  1187.         if (y instanceof Window) keyWindow = t;
  1188.       }
  1189.  
  1190.       const dummyObjectProxyHandler = {
  1191.         get(target, prop) {
  1192.           let v = target[prop]
  1193.           if (v instanceof Window && !keyWindow) {
  1194.             keyWindow = t;
  1195.           }
  1196.           let y = typeof v === 'function' ? nilFunc : typeof v === 'object' ? nilObj : v;
  1197.           if (prop === keyWindow) y = {
  1198.             requestAnimationFrame(f) {
  1199.               return 3;
  1200.             },
  1201.             cancelAnimationFrame() {
  1202.  
  1203.             }
  1204.           }
  1205.           if (!keyFuncC && typeof v === 'function' && !(prop in target.constructor.prototype)) {
  1206.             keyFuncC = prop;
  1207.           }
  1208.           // console.log('[get]', prop, typeof target[prop])
  1209.  
  1210.  
  1211.           return y;
  1212.         },
  1213.         set(target, prop, value) {
  1214.  
  1215.           if (typeof value === 'boolean' && !keyBoolD) {
  1216.             keyBoolD = prop;
  1217.           }
  1218.           if (typeof value === 'number' && !keyCidj && value >= 2) {
  1219.             keyCidj = prop;
  1220.           }
  1221.  
  1222.           // console.log('[set]', prop, value)
  1223.           target[prop] = value
  1224.  
  1225.           return true;
  1226.         }
  1227.       };
  1228.  
  1229.       dummyObject.start.call(new Proxy(dummyObject, dummyObjectProxyHandler))
  1230.  
  1231.       /*
  1232.             console.log({
  1233.               keyBoolD,
  1234.               keyFuncC,
  1235.               keyWindow,
  1236.               keyCidj
  1237.             })
  1238.  
  1239.             console.log( dummyObject[keyFuncC])
  1240.  
  1241.  
  1242.             console.log(2222222222)
  1243.       */
  1244.  
  1245.  
  1246.  
  1247.       g[k].prototype.start = function () {
  1248.         this.stop();
  1249.         this[keyBoolD] = true;
  1250.         this[keyCidj] = rafHub.request(this[keyFuncC]);
  1251.       }
  1252.         ;
  1253.       g[k].prototype.stop = function () {
  1254.         if (this.isActive() && this[keyCidj]) {
  1255.           rafHub.cancel(this[keyCidj]);
  1256.         }
  1257.         this[keyCidj] = null
  1258.       }
  1259.  
  1260.  
  1261.       /*
  1262.         g[k].start = function() {
  1263.             this.stop();
  1264.             this.D = true;
  1265.             var a = requestAnimationFrame
  1266.               , b = cancelAnimationFrame;
  1267.             this.j =  a.call(this.B, this.C)
  1268.         }
  1269.         ;
  1270.         g[k].stop = function() {
  1271.             if (this.isActive()) {
  1272.                 var a = requestAnimationFrame
  1273.                   , b = cancelAnimationFrame;
  1274.                 b.call(this.B, this.j)
  1275.             }
  1276.             this.j = null
  1277.         }
  1278.       */
  1279.  
  1280.  
  1281.  
  1282.       const keyzo = PERF_471489_ ? getzo(_yt_player) : null;
  1283.  
  1284.       if (keyzo) {
  1285.  
  1286.         k = keyzo
  1287.  
  1288.         const setCSSProp = (() => {
  1289.  
  1290.           let animationPropCapable = false;
  1291.           try {
  1292.             const propName = "--ibxpf"
  1293.             const value = 2;
  1294.             const keyframes = [{
  1295.               [propName]: value
  1296.             }];
  1297.             window.CSS.registerProperty({
  1298.               name: "--ibxpf",
  1299.               syntax: "<number>",
  1300.               inherits: false,
  1301.               initialValue: 1,
  1302.             });
  1303.             animationPropCapable = '1' === `${getComputedStyle(document.documentElement).getPropertyValue('--ibxpf')}`
  1304.           } catch (e) { }
  1305.  
  1306.           if (!animationPropCapable) {
  1307.             return (element, cssProp, value) => {
  1308.  
  1309.  
  1310.               element.style.setProperty(cssProp, value);
  1311.  
  1312.             }
  1313.           }
  1314.  
  1315.           const propMaps = new Map();
  1316.  
  1317.           function setCustomCSSProperty(element, propName, value) {
  1318.             let wm = propMaps.get(propName);
  1319.             if (!wm) {
  1320.  
  1321.               try {
  1322.                 window.CSS.registerProperty({
  1323.                   name: propName,
  1324.                   syntax: "*",
  1325.                   inherits: false
  1326.                 });
  1327.               } catch (e) {
  1328.                 console.warn(e);
  1329.               }
  1330.  
  1331.               propMaps.set(propName, (wm = new WeakMap()));
  1332.             }
  1333.  
  1334.             // Create the animation keyframes with the provided property and value
  1335.             const keyframes = [{
  1336.               [propName]: value
  1337.             }];
  1338.  
  1339.             let currentAnimation = wm.get(element);
  1340.             if (currentAnimation) {
  1341.  
  1342.               currentAnimation.effect.setKeyframes(keyframes);
  1343.  
  1344.             } else {
  1345.  
  1346.  
  1347.  
  1348.               // Set the animation on the element and immediately pause it
  1349.               const animation = animate.call(element, keyframes, {
  1350.                 duration: 1, // Very short duration as we just want to set the value
  1351.                 fill: 'forwards',
  1352.                 iterationStart: 1,
  1353.                 iterations: 2,
  1354.                 direction: 'alternate'
  1355.               });
  1356.  
  1357.  
  1358.               // animation.currentTime = 1;
  1359.               animation.pause();
  1360.  
  1361.               wm.set(element, animation);
  1362.  
  1363.  
  1364.             }
  1365.  
  1366.           }
  1367.  
  1368.           return setCustomCSSProperty;
  1369.  
  1370.  
  1371.         })();
  1372.  
  1373.  
  1374.         const attrUpdateFn = g[k];
  1375.         g['$$original$$' + k] = attrUpdateFn;
  1376.         g[k] = function (a, b, c) {
  1377.  
  1378.           // console.log(140000, a, b, c);
  1379.  
  1380.           let transformType = '';
  1381.           let transformValue = 0;
  1382.           let transformUnit = '';
  1383.  
  1384.           let byPassDefaultFn = false;
  1385.           if (b === "transform" && typeof c === 'string') {
  1386.  
  1387.             byPassDefaultFn = true;
  1388.  
  1389.             const aStyle = a.style;
  1390.  
  1391.             // let beforeMq = aStyle.getPropertyValue('--mq-transform');
  1392.             if (!(a instanceof HTMLElement)) return;
  1393.             if (c.length === 0) {
  1394.  
  1395.             } else if (c.startsWith('scalex(0.') || (c === 'scalex(0)' || c === 'scalex(1)')) {
  1396.               let p = c.substring(7, c.length - 1);
  1397.               let q = p.length >= 1 ? parseFloat(p) : -1;
  1398.               if (q > -1e-5 && q < 1 + 1e-5) {
  1399.                 transformType = 'scalex'
  1400.                 transformValue = q;
  1401.                 transformUnit = '';
  1402.               }
  1403.  
  1404.  
  1405.             } else if (c.startsWith('translateX(') && c.endsWith('px)')) {
  1406.  
  1407.               let p = c.substring(11, c.length - 3);
  1408.               let q = p.length >= 1 ? parseFloat(p) : NaN;
  1409.  
  1410.               if (typeof q === 'number' && !isNaN(q)) {
  1411.                 transformType = 'translateX'
  1412.                 transformValue = q;
  1413.                 transformUnit = 'px';
  1414.               }
  1415.  
  1416.  
  1417.             } else if (c.startsWith('scaley(0.') || (c === 'scaley(0)' || c === 'scaley(1)')) {
  1418.               let p = c.substring(7, c.length - 1);
  1419.               let q = p.length >= 1 ? parseFloat(p) : -1;
  1420.               if (q > -1e-5 && q < 1 + 1e-5) {
  1421.                 transformType = 'scaley'
  1422.                 transformValue = q;
  1423.                 transformUnit = '';
  1424.               }
  1425.  
  1426.  
  1427.             } else if (c.startsWith('translateY(') && c.endsWith('px)')) {
  1428.  
  1429.               let p = c.substring(11, c.length - 3);
  1430.               let q = p.length >= 1 ? parseFloat(p) : NaN;
  1431.  
  1432.               if (typeof q === 'number' && !isNaN(q)) {
  1433.                 transformType = 'translateY'
  1434.                 transformValue = q;
  1435.                 transformUnit = 'px';
  1436.               }
  1437.  
  1438.  
  1439.             }
  1440.  
  1441.             if (transformType) {
  1442.  
  1443.               if (transformType === 'scalex' || transformType === 'scaley') {
  1444.  
  1445.                 const q = transformValue;
  1446.  
  1447.  
  1448.                 /*
  1449.  
  1450.                 let vz = Math.round(steppingScaleN * q);
  1451.                 const customPropName = '--discrete-'+transformType
  1452.  
  1453.                 const currentValue = aStyle.getPropertyValue(customPropName);
  1454.  
  1455.                 const transform = (aStyle.transform || '');
  1456.                 const u = transform.includes(customPropName)
  1457.                 if (`${currentValue}` === `${vz}`) {
  1458.                   if (u) return;
  1459.                 }
  1460.  
  1461.  
  1462.                 setCSSProp(a,customPropName, vz);
  1463.                 // aStyle.setProperty(customPropName, vz)
  1464.  
  1465.                 let ck = '';
  1466.  
  1467.                 if (c.length === 9) ck = c;
  1468.                 else if (!u) ck = c.replace(/[.\d]+/, '0.5');
  1469.  
  1470.                 if (ck && beforeMq !== ck) {
  1471.                   aStyle.setProperty('--mq-transform', ck);
  1472.                 }
  1473.  
  1474.                 if (u) return;
  1475.                 c = `${transformType}(calc(var(--discrete-${transformType})/${steppingScaleN}))`;
  1476.  
  1477.  
  1478.  
  1479.                 */
  1480.  
  1481.                 const vz = +(Math.round(q * steppingScaleN) / steppingScaleN).toFixed(3);
  1482.  
  1483.                 c = `${transformType === 'scalex' ? 'scaleX' : 'scaleY'}(${vz})`
  1484.                 const cv = aStyle.transform;
  1485.  
  1486.                 // console.log(157, cv,c)
  1487.  
  1488.                 if (c === cv) return;
  1489.                 // console.log(257, cv,c)
  1490.  
  1491.                 aStyle.transform = c;
  1492.  
  1493.                 // return;
  1494.  
  1495.               } else if (transformType === 'translateX' || transformType === 'translateY') {
  1496.  
  1497.                 const q = transformValue;
  1498.  
  1499.                 /*
  1500.  
  1501.                 let vz = q.toFixed(1);
  1502.                 const customPropName = '--discrete-'+transformType
  1503.  
  1504.                 const aStyle = a.style;
  1505.                 const currentValue = (aStyle.getPropertyValue(customPropName) || '').replace('px', '');
  1506.  
  1507.  
  1508.                 const transform = (aStyle.transform || '');
  1509.                 const u = transform.includes(customPropName)
  1510.                 if (parseFloat(currentValue).toFixed(1) === vz) {
  1511.                   if (u) return;
  1512.                 }
  1513.  
  1514.                 setCSSProp(a,customPropName, vz + 'px');
  1515.                 // aStyle.setProperty(customPropName, vz + 'px')
  1516.  
  1517.                 let ck = '';
  1518.                 if (c.length === 15) ck = c;
  1519.                 else if (!u) ck = c.replace(/[.\d]+/, '0.5');
  1520.  
  1521.                 if (ck && beforeMq !== ck) {
  1522.                   aStyle.setProperty('--mq-transform', ck);
  1523.                 }
  1524.  
  1525.                 if (u) return;
  1526.                 c = `${transformType}(var(--discrete-${transformType}))`;
  1527.  
  1528.                 */
  1529.  
  1530.  
  1531.                 const vz = +q.toFixed(1);
  1532.  
  1533.                 c = `${transformType}(${vz}${transformUnit})`
  1534.                 const cv = aStyle.transform;
  1535.  
  1536.                 // console.log(158, cv,c)
  1537.  
  1538.                 if (c === cv) return;
  1539.                 // console.log(258, cv,c)
  1540.  
  1541.                 aStyle.transform = c;
  1542.  
  1543.                 // return;
  1544.  
  1545.               } else {
  1546.                 throw new Error();
  1547.               }
  1548.  
  1549.             } else {
  1550.               // if(beforeMq) a.style.setProperty('--mq-transform', '');
  1551.               const cv = aStyle.transform
  1552.               if (!c && !cv) return;
  1553.               else if (c === cv) return;
  1554.               aStyle.transform = c;
  1555.               // return;
  1556.             }
  1557.  
  1558.           } else if (b === "display") {
  1559.  
  1560.             const cv = a.style.display;
  1561.             if (!cv && !c) return;
  1562.             if (cv === c) return;
  1563.  
  1564.  
  1565.           } else if (b === "width") {
  1566.  
  1567.             const cv = a.style.width;
  1568.             if (!cv && !c) return;
  1569.             if (cv === c) return;
  1570.  
  1571.           }
  1572.  
  1573.           // console.log(130000, a, b, c);
  1574.  
  1575.           if (byPassDefaultFn) return;
  1576.           return attrUpdateFn.call(this, a, b, c);
  1577.         }
  1578.  
  1579.  
  1580.         /*
  1581.  
  1582.             g.zo = function(a, b, c) {
  1583.                 if ("string" === typeof b)
  1584.                     (b = yo(a, b)) && (a.style[b] = c);
  1585.                 else
  1586.                     for (var d in b) {
  1587.                         c = a;
  1588.                         var e = b[d]
  1589.                           , f = yo(c, d);
  1590.                         f && (c.style[f] = e)
  1591.                     }
  1592.             }
  1593.  
  1594.  
  1595.         */
  1596.  
  1597.  
  1598.       }
  1599.  
  1600.  
  1601.  
  1602.       const keyuG = PERF_471489_ ? getuG(_yt_player) : null;
  1603.  
  1604.       if (keyuG) {
  1605.  
  1606.         k = keyuG;
  1607.  
  1608.         const gk = g[k];
  1609.         const gkp = gk.prototype;
  1610.  
  1611.  
  1612.         /** @type { Map<string, WeakMap<any, any>> } */
  1613.         const ntLogs = new Map();
  1614.  
  1615.         if (typeof gkp.updateValue === 'function' && gkp.updateValue.length === 2 && !gkp.updateValue31) {
  1616.  
  1617.           gkp.updateValue31 = gkp.updateValue;
  1618.           gkp.updateValue = function (a, b) {
  1619.             if (typeof a !== 'string') return this.updateValue31(a, b);
  1620.  
  1621.             const element = this.element;
  1622.             if (!(element instanceof HTMLElement)) return this.updateValue31(a, b);
  1623.  
  1624.             let ntLog = ntLogs.get(a);
  1625.             if (!ntLog) ntLogs.set(a, (ntLog = new WeakMap()));
  1626.  
  1627.             let cache = ntLog.get(element);
  1628.             if (cache && cache.value === b) {
  1629.               return;
  1630.             }
  1631.             if (!cache) {
  1632.               this.__oldValueByUpdateValue__ = null;
  1633.               ntLog.set(element, cache = { value: b });
  1634.             } else {
  1635.               this.__oldValueByUpdateValue__ = cache.value;
  1636.               cache.value = b;
  1637.             }
  1638.  
  1639.  
  1640.             return this.updateValue31(a, b);
  1641.           }
  1642.  
  1643.  
  1644.           /*
  1645.             g.k.update = function(a) {
  1646.                 for (var b = g.u(Object.keys(a)), c = b.next(); !c.done; c = b.next())
  1647.                     c = c.value,
  1648.                     this.updateValue(c, a[c])
  1649.             }
  1650.             ;
  1651.             g.k.updateValue = function(a, b) {
  1652.                 (a = this.Td["{{" + a + "}}"]) && wG(this, a[0], a[1], b)
  1653.             }
  1654.           */
  1655.  
  1656.  
  1657.         }
  1658.  
  1659.  
  1660.       }
  1661.  
  1662.  
  1663.  
  1664.  
  1665.     })();
  1666.  
  1667.  
  1668.  
  1669.     FIX_Animation_n_timeline && (async () => {
  1670.  
  1671.  
  1672.       const timeline = await new Promise(resolve => {
  1673.  
  1674.         let cid = setInterval(() => {
  1675.           let t = (((document || 0).timeline || 0) || 0);
  1676.           if (t && typeof t._play === 'function') {
  1677.  
  1678.             clearInterval(cid);
  1679.             resolve(t);
  1680.           }
  1681.         }, 1);
  1682.  
  1683.         promiseForTamerTimeout.then(() => {
  1684.           resolve(null)
  1685.         });
  1686.  
  1687.       });
  1688.  
  1689.  
  1690.       const Animation = await new Promise(resolve => {
  1691.  
  1692.         let cid = setInterval(() => {
  1693.           let t = (((window || 0).Animation || 0) || 0);
  1694.           if (t && typeof t === 'function' && t.length === 2 && typeof t.prototype._updatePromises === 'function') {
  1695.  
  1696.             clearInterval(cid);
  1697.             resolve(t);
  1698.           }
  1699.         }, 1);
  1700.  
  1701.         promiseForTamerTimeout.then(() => {
  1702.           resolve(null)
  1703.         });
  1704.  
  1705.       });
  1706.  
  1707.       if (!timeline) return;
  1708.       if (!Animation) return;
  1709.  
  1710.       const aniProto = Animation.prototype;
  1711.       // aniProto.sequenceNumber = 0; // native YouTube engine bug - sequenceNumber is not set
  1712.  
  1713.       const getXroto = (x) => {
  1714.         try {
  1715.           return x.__proto__;
  1716.         } catch (e) { }
  1717.         return null;
  1718.       }
  1719.       const timProto = getXroto(timeline);
  1720.       if (!timProto) return;
  1721.       if (
  1722.         (
  1723.           typeof timProto.getAnimations === 'function' && typeof timProto.play === 'function' &&
  1724.           typeof timProto._discardAnimations === 'function' && typeof timProto._play === 'function' &&
  1725.           typeof timProto._updateAnimationsPromises === 'function' && !timProto.nofCQ &&
  1726.           typeof aniProto._updatePromises === 'function' && !aniProto.nofYH
  1727.         )
  1728.  
  1729.       ) {
  1730.  
  1731.         timProto.nofCQ = 1;
  1732.         aniProto.nofYH = 1;
  1733.  
  1734.         const originalAnimationsWithPromises = ((_updateAnimationsPromises) => {
  1735.  
  1736.  
  1737.           /*
  1738.             v.animationsWithPromises = v.animationsWithPromises.filter(function (c) {
  1739.               return c._updatePromises();
  1740.             });
  1741.           */
  1742.  
  1743.           const p = Array.prototype.filter;
  1744.  
  1745.           let res = null;
  1746.           Array.prototype.filter = function () {
  1747.  
  1748.             res = this;
  1749.             return this;
  1750.  
  1751.           };
  1752.  
  1753.           _updateAnimationsPromises.call({});
  1754.  
  1755.           Array.prototype.filter = p;
  1756.  
  1757.           if (res && typeof res.length === 'number') {
  1758.             /** @type {any[]} */
  1759.             const _res = res;
  1760.             return _res;
  1761.           }
  1762.  
  1763.  
  1764.           return null;
  1765.  
  1766.  
  1767.  
  1768.  
  1769.         })(timProto._updateAnimationsPromises);
  1770.  
  1771.         if (!originalAnimationsWithPromises || typeof originalAnimationsWithPromises.length !== 'number') return;
  1772.  
  1773.         // console.log('originalAnimationsWithPromises', originalAnimationsWithPromises)
  1774.  
  1775.         aniProto._updatePromises31 = aniProto._updatePromises;
  1776.  
  1777.         /*
  1778.         aniProto._updatePromises = function(){
  1779.           console.log('eff',this._oldPlayState, this.playState)
  1780.           return this._updatePromises31.apply(this, arguments)
  1781.         }
  1782.         */
  1783.  
  1784.         aniProto._updatePromises = function () {
  1785.           var oldPlayState = this._oldPlayState;
  1786.           var newPlayState = this.playState;
  1787.           // console.log('ett', oldPlayState, newPlayState)
  1788.           if (newPlayState !== oldPlayState) {
  1789.             this._oldPlayState = newPlayState;
  1790.             if (this._readyPromise) {
  1791.               if ("idle" == newPlayState) {
  1792.                 this._rejectReadyPromise();
  1793.                 this._readyPromise = void 0;
  1794.               } else if ("pending" == oldPlayState) {
  1795.                 this._resolveReadyPromise();
  1796.               } else if ("pending" == newPlayState) {
  1797.                 this._readyPromise = void 0;
  1798.               }
  1799.             }
  1800.             if (this._finishedPromise) {
  1801.               if ("idle" == newPlayState) {
  1802.                 this._rejectFinishedPromise();
  1803.                 this._finishedPromise = void 0;
  1804.               } else if ("finished" == newPlayState) {
  1805.                 this._resolveFinishedPromise();
  1806.               } else if ("finished" == oldPlayState) {
  1807.                 this._finishedPromise = void 0;
  1808.               }
  1809.             }
  1810.           }
  1811.           return this._readyPromise || this._finishedPromise;
  1812.         };
  1813.  
  1814.  
  1815.         let restartWebAnimationsNextTickFlag = false;
  1816.  
  1817.         const looperMethodT = () => {
  1818.  
  1819.           const runnerFn = (hRes) => {
  1820.             var b = timeline;
  1821.             b.currentTime = hRes;
  1822.             b._discardAnimations();
  1823.             if (0 == b._animations.length) {
  1824.               restartWebAnimationsNextTickFlag = false;
  1825.             } else {
  1826.               getRafPromiseForTickers().then(runnerFn);
  1827.             }
  1828.           }
  1829.  
  1830.           const restartWebAnimationsNextTick = () => {
  1831.             if (!restartWebAnimationsNextTickFlag) {
  1832.               restartWebAnimationsNextTickFlag = true;
  1833.               getRafPromiseForTickers().then(runnerFn);
  1834.             }
  1835.           }
  1836.  
  1837.           return { restartWebAnimationsNextTick }
  1838.         };
  1839.  
  1840.  
  1841.         const looperMethodN = () => {
  1842.  
  1843.           const acs = document.createElement('a-f');
  1844.           acs.id = 'a-f';
  1845.  
  1846.           const style = document.createElement('style');
  1847.           style.textContent = `
  1848.             @keyFrames aF1 {
  1849.               0% {
  1850.                 order: 0;
  1851.               }
  1852.               100% {
  1853.                 order: 6;
  1854.               }
  1855.             }
  1856.             #a-f[id] {
  1857.               visibility: collapse !important;
  1858.               position: fixed !important;
  1859.               top: -100px !important;
  1860.               left: -100px !important;
  1861.               margin:0 !important;
  1862.               padding:0 !important;
  1863.               outline:0 !important;
  1864.               border:0 !important;
  1865.               z-index:-1 !important;
  1866.               width: 0px !important;
  1867.               height: 0px !important;
  1868.               contain: strict !important;
  1869.               pointer-events: none !important;
  1870.               animation: 1ms steps(2) 0ms infinite alternate forwards running aF1 !important;
  1871.             }
  1872.           `;
  1873.           (document.head || document.documentElement).appendChild(style);
  1874.  
  1875.           document.documentElement.insertBefore(acs, document.documentElement.firstChild);
  1876.  
  1877.           const _onanimationiteration = function (evt) {
  1878.             const hRes = evt.timeStamp;
  1879.             var b = timeline;
  1880.             b.currentTime = hRes;
  1881.             b._discardAnimations();
  1882.             if (0 == b._animations.length) {
  1883.               restartWebAnimationsNextTickFlag = false;
  1884.               acs.onanimationiteration = null;
  1885.             } else {
  1886.               acs.onanimationiteration = _onanimationiteration;
  1887.             }
  1888.  
  1889.           }
  1890.  
  1891.  
  1892.  
  1893.           const restartWebAnimationsNextTick = () => {
  1894.             if (!restartWebAnimationsNextTickFlag) {
  1895.               restartWebAnimationsNextTickFlag = true;
  1896.               acs.onanimationiteration = _onanimationiteration;
  1897.  
  1898.             }
  1899.           }
  1900.  
  1901.           return { restartWebAnimationsNextTick }
  1902.         };
  1903.  
  1904.  
  1905.  
  1906.         const { restartWebAnimationsNextTick } = ('onanimationiteration' in document.documentElement) ? looperMethodN() : looperMethodT();
  1907.  
  1908.  
  1909.         // console.log(571, timProto);
  1910.         timProto._play = function (c) {
  1911.           c = new Animation(c, this);
  1912.           this._animations.push(c);
  1913.           restartWebAnimationsNextTick();
  1914.           c._updatePromises();
  1915.           c._animation.play();
  1916.           c._updatePromises();
  1917.           return c
  1918.         }
  1919.  
  1920.         const animationsWithPromisesMap = new Set(originalAnimationsWithPromises);
  1921.         originalAnimationsWithPromises.length = 0;
  1922.         originalAnimationsWithPromises.push = null;
  1923.         originalAnimationsWithPromises.splice = null;
  1924.         originalAnimationsWithPromises.slice = null;
  1925.         originalAnimationsWithPromises.indexOf = null;
  1926.         originalAnimationsWithPromises.unshift = null;
  1927.         originalAnimationsWithPromises.shift = null;
  1928.         originalAnimationsWithPromises.pop = null;
  1929.         originalAnimationsWithPromises.filter = null;
  1930.         originalAnimationsWithPromises.forEach = null;
  1931.         originalAnimationsWithPromises.map = null;
  1932.  
  1933.  
  1934.         const nilFn = () => { };
  1935.  
  1936.         const _updateAnimationsPromises = () => {
  1937.           animationsWithPromisesMap.forEach(c => {
  1938.             if (!c._updatePromises()) animationsWithPromisesMap.delete(c);
  1939.           });
  1940.           /*
  1941.           v.animationsWithPromises = v.animationsWithPromises.filter(function (c) {
  1942.             return c._updatePromises();
  1943.           });
  1944.           */
  1945.         }
  1946.  
  1947.         timProto._updateAnimationsPromises31 = timProto._updateAnimationsPromises;
  1948.  
  1949.         timProto._updateAnimationsPromises = _updateAnimationsPromises;
  1950.  
  1951.         delete timProto._updateAnimationsPromises;
  1952.         Object.defineProperty(timProto, '_updateAnimationsPromises', {
  1953.           get() {
  1954.             if (animationsWithPromisesMap.size === 0) return nilFn;
  1955.             return _updateAnimationsPromises;
  1956.           },
  1957.           set(nv) {
  1958.             delete this._updateAnimationsPromises;
  1959.             this._updateAnimationsPromises = nv;
  1960.           },
  1961.           enumerable: true,
  1962.           configurable: true,
  1963.         });
  1964.  
  1965.  
  1966.         let pdFinished = Object.getOwnPropertyDescriptor(aniProto, 'finished');
  1967.         aniProto.__finished_native_get__ = pdFinished.get;
  1968.         if (typeof pdFinished.get === 'function' && !pdFinished.set && pdFinished.configurable === true && pdFinished.enumerable === true) {
  1969.  
  1970.  
  1971.           Object.defineProperty(aniProto, 'finished', {
  1972.             get() {
  1973.               this._finishedPromise || (!animationsWithPromisesMap.has(this) && animationsWithPromisesMap.add(this),
  1974.                 this._finishedPromise = new Promise((resolve, reject) => {
  1975.                   this._resolveFinishedPromise = function () {
  1976.                     resolve(this)
  1977.                   };
  1978.                   this._rejectFinishedPromise = function () {
  1979.                     reject({
  1980.                       type: DOMException.ABORT_ERR,
  1981.                       name: "AbortError"
  1982.                     })
  1983.                   };
  1984.                 }),
  1985.                 "finished" == this.playState && this._resolveFinishedPromise());
  1986.               return this._finishedPromise
  1987.             },
  1988.             set: undefined,
  1989.             enumerable: true,
  1990.             configurable: true
  1991.           });
  1992.  
  1993.         }
  1994.  
  1995.  
  1996.  
  1997.         let pdReady = Object.getOwnPropertyDescriptor(aniProto, 'ready');
  1998.         aniProto.__ready_native_get__ = pdReady.get;
  1999.         if (typeof pdReady.get === 'function' && !pdReady.set && pdReady.configurable === true && pdReady.enumerable === true) {
  2000.  
  2001.           Object.defineProperty(aniProto, 'ready', {
  2002.             get() {
  2003.               this._readyPromise || (!animationsWithPromisesMap.has(this) && animationsWithPromisesMap.add(this),
  2004.                 this._readyPromise = new Promise((resolve, reject) => {
  2005.                   this._resolveReadyPromise = function () {
  2006.                     resolve(this)
  2007.                   };
  2008.                   this._rejectReadyPromise = function () {
  2009.                     reject({
  2010.                       type: DOMException.ABORT_ERR,
  2011.                       name: "AbortError"
  2012.                     })
  2013.                   };
  2014.                 }),
  2015.                 "pending" !== this.playState && this._resolveReadyPromise());
  2016.               return this._readyPromise
  2017.             },
  2018.             set: undefined,
  2019.             enumerable: true,
  2020.             configurable: true
  2021.           });
  2022.  
  2023.         }
  2024.  
  2025.  
  2026.         if (IGNORE_bindAnimationForCustomEffect && typeof aniProto._rebuildUnderlyingAnimation === 'function' && !aniProto._rebuildUnderlyingAnimation21 && aniProto._rebuildUnderlyingAnimation.length === 0) {
  2027.  
  2028.           aniProto._rebuildUnderlyingAnimation21 = aniProto._rebuildUnderlyingAnimation;
  2029.           const _rebuildUnderlyingAnimation = function () {
  2030.             // if (isNaN(this._sequenceNumber)) return; // do not rebuild underlying animation if native animation is used.
  2031.             this.effect && this.effect._onsample && (this.effect._onsample = null);
  2032.             return this._rebuildUnderlyingAnimation21();
  2033.           }
  2034.           aniProto._rebuildUnderlyingAnimation = _rebuildUnderlyingAnimation;
  2035.           // delete aniProto._rebuildUnderlyingAnimation;
  2036.           // Object.defineProperty(aniProto, '_rebuildUnderlyingAnimation', {
  2037.           //   get() {
  2038.           //     if (isNaN(this._sequenceNumber)) return nilFn;
  2039.           //     return this._rebuildUnderlyingAnimation21;
  2040.           //   },
  2041.           //   set(nv) {
  2042.           //     delete this._rebuildUnderlyingAnimation;
  2043.           //     this._rebuildUnderlyingAnimation = nv;
  2044.           //   },
  2045.           //   enumerable: true,
  2046.           //   configurable: true
  2047.           // });
  2048.         }
  2049.  
  2050.  
  2051.         /*
  2052.  
  2053.  
  2054.           function f(c) {
  2055.               var b = v.timeline;
  2056.               b.currentTime = c;
  2057.               b._discardAnimations();
  2058.               0 == b._animations.length ? d = !1 : requestAnimationFrame(f)
  2059.           }
  2060.           var h = window.requestAnimationFrame;
  2061.           window.requestAnimationFrame = function(c) {
  2062.               return h(function(b) {
  2063.                   v.timeline._updateAnimationsPromises();
  2064.                   c(b);
  2065.                   v.timeline._updateAnimationsPromises()
  2066.               })
  2067.           }
  2068.           ;
  2069.           v.AnimationTimeline = function() {
  2070.               this._animations = [];
  2071.               this.currentTime = void 0
  2072.           }
  2073.           ;
  2074.           v.AnimationTimeline.prototype = {
  2075.               getAnimations: function() {
  2076.                   this._discardAnimations();
  2077.                   return this._animations.slice()
  2078.               },
  2079.               _updateAnimationsPromises: function() {
  2080.                   v.animationsWithPromises = v.animationsWithPromises.filter(function(c) {
  2081.                       return c._updatePromises()
  2082.                   })
  2083.               },
  2084.               _discardAnimations: function() {
  2085.                   this._updateAnimationsPromises();
  2086.                   this._animations = this._animations.filter(function(c) {
  2087.                       return "finished" != c.playState && "idle" != c.playState
  2088.                   })
  2089.               },
  2090.               _play: function(c) {
  2091.                   c = new v.Animation(c,this);
  2092.                   this._animations.push(c);
  2093.                   v.restartWebAnimationsNextTick();
  2094.                   c._updatePromises();
  2095.                   c._animation.play();
  2096.                   c._updatePromises();
  2097.                   return c
  2098.               },
  2099.               play: function(c) {
  2100.                   c && c.remove();
  2101.                   return this._play(c)
  2102.               }
  2103.           };
  2104.           var d = !1;
  2105.           v.restartWebAnimationsNextTick = function() {
  2106.               d || (d = !0,
  2107.               requestAnimationFrame(f))
  2108.           }
  2109.           ;
  2110.           var a = new v.AnimationTimeline;
  2111.           v.timeline = a;
  2112.           try {
  2113.               Object.defineProperty(window.document, "timeline", {
  2114.                   configurable: !0,
  2115.                   get: function() {
  2116.                       return a
  2117.                   }
  2118.               })
  2119.           } catch (c) {}
  2120.           try {
  2121.               window.document.timeline = a
  2122.           } catch (c) {}
  2123.  
  2124.         */
  2125.  
  2126.  
  2127.  
  2128.         /*
  2129.  
  2130.       var g = window.getComputedStyle;
  2131.       Object.defineProperty(window, "getComputedStyle", {
  2132.           configurable: !0,
  2133.           enumerable: !0,
  2134.           value: function() {
  2135.               v.timeline._updateAnimationsPromises();
  2136.               var e = g.apply(this, arguments);
  2137.               h() && (e = g.apply(this, arguments));
  2138.               v.timeline._updateAnimationsPromises();
  2139.               return e
  2140.           }
  2141.       });
  2142.  
  2143.       */
  2144.  
  2145.  
  2146.  
  2147.  
  2148.       }
  2149.  
  2150.  
  2151.  
  2152.  
  2153.     })();
  2154.  
  2155.  
  2156.  
  2157.   });
  2158.  
  2159.  
  2160.   setupEvents();
  2161.  
  2162.  
  2163.  
  2164.   if (isMainWindow) {
  2165.  
  2166.     console.groupCollapsed(
  2167.       "%cYouTube JS Engine Tamer",
  2168.       "background-color: #EDE43B ; color: #000 ; font-weight: bold ; padding: 4px ;"
  2169.     );
  2170.  
  2171.  
  2172.  
  2173.     console.log("Script is loaded.");
  2174.     console.log("This script changes the core mechanisms of the YouTube JS engine.");
  2175.  
  2176.     console.log("This script is experimental and subject to further changes.");
  2177.  
  2178.     console.log("This might boost your YouTube performance.");
  2179.  
  2180.     console.log("CAUTION: This might break your YouTube.");
  2181.  
  2182.  
  2183.     if (prepareLogs.length >= 1) {
  2184.       console.log(" =========================================================================== ");
  2185.  
  2186.       for (const msg of prepareLogs) {
  2187.         console.log(msg)
  2188.       }
  2189.  
  2190.       console.log(" =========================================================================== ");
  2191.     }
  2192.  
  2193.     console.groupEnd();
  2194.  
  2195.   }
  2196.  
  2197.  
  2198. })();