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prevent-playlist-autoplay

Prevent autoplay for HTML5 video playlists (particularly on YouTube) by making them pause before they can move on. Works on videos in iframes too.

  1. // ==UserScript==
  2. // @name         prevent-playlist-autoplay
  3. // @namespace    https://github.com/ahuanguchi
  4. // @version      1.1.0
  5. // @description  Prevent autoplay for HTML5 video playlists (particularly on YouTube) by making them pause before they can move on. Works on videos in iframes too.
  6. // @author       ahuanguchi
  7. // @match        *://*/*
  8. // @grant        none
  9. // @run-at       document-start
  10. // ==/UserScript==
  11.  
  12. (function () {
  13.   var video, duration, currentSrc, previousSrc;
  14.   var waitTime = 1500;
  15.   function checkTime() {
  16.     if (duration - video.currentTime < 0.5) {
  17.       video.pause();
  18.       video.removeEventListener("timeupdate", checkTime);
  19.     }
  20.   }
  21.   function preventPlaylistAutoplay() {
  22.     var loc = document.location;
  23.     video = document.getElementsByTagName("video")[0];
  24.     if (video) {
  25.       if (!currentSrc) {
  26.         currentSrc = video.src;
  27.       }
  28.       duration = video.duration;
  29.       if (loc.hostname === "www.youtube.com" && loc.search.indexOf("list=") === -1) {
  30.         return;
  31.       }
  32.       video.addEventListener("timeupdate", checkTime);
  33.       console.info("Tracking video time.");
  34.     } else {
  35.       console.info("No video found.");
  36.     }
  37.   }
  38.   function checkSrc() {
  39.     if (video) {
  40.       previousSrc = currentSrc;
  41.       currentSrc = video.src;
  42.       if (currentSrc !== previousSrc) {
  43.         console.info("Finding next video.");
  44.         preventPlaylistAutoplay();
  45.       }
  46.     }
  47.   }
  48.   window.addEventListener("load", function () {
  49.     window.setTimeout(preventPlaylistAutoplay, waitTime);
  50.   });
  51.   window.addEventListener("click", function () {
  52.     window.setTimeout(checkSrc, waitTime);
  53.   });
  54.   window.addEventListener("keyup", function () {
  55.     window.setTimeout(checkSrc, waitTime);
  56.   });
  57. }());