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YouTube Subtitle Downloader (Manual Trigger) with TrustedHTML Bypass and Spinner in Polymer Element

Fetch subtitles as SRT with manual trigger, bypass TrustedHTML policy, and insert a button (with spinner) into a Polymer dropdown element

当前为 2025-03-13 提交的版本，查看 最新版本。

如何安装

您需要先安装一款用户脚本管理器扩展，例如 Tampermonkey 篡改猴、Greasemonkey 油猴子 或 Violentmonkey 暴力猴，才能安装此脚本。

您需要先安装一款用户脚本管理器扩展，例如 Tampermonkey 篡改猴，才能安装此脚本。

您需要先安装一款用户脚本管理器扩展，例如 Tampermonkey 篡改猴 或 Violentmonkey 暴力猴，才能安装此脚本。

您需要先安装一款用户脚本管理器扩展，例如 Tampermonkey 篡改猴 或 Userscripts ，才能安装此脚本。

您需要先安装一款用户脚本管理器扩展，例如 Tampermonkey 篡改猴，才能安装此脚本。

您需要先安装一款用户脚本管理器扩展后才能安装此脚本。

（我已经安装了用户脚本管理器，让我安装！）

如何安装

您需要先安装一款用户样式管理器扩展，比如 Stylus，才能安装此样式。

您需要先安装一款用户样式管理器扩展，比如 Stylus，才能安装此样式。

您需要先安装一款用户样式管理器扩展，比如 Stylus，才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

（我已经安装了用户样式管理器，让我安装！）

作者
lihuelworks
评分
0 0 0
版本
1.4
创建于
2025-03-13
更新于
2025-03-13
大小
8.6 KB
许可证
MIT
适用于

YouTube Subtitle Downloader (Manual Trigger) with TrustedHTML Bypass

Overview

This user script allows you to view or download YouTube video subtitles in SRT format with a manual trigger. It fetches the most default subtitles (auto-generated or the first available track) using the YouTube API. You can either open the subtitles in a new tab or download them directly, depending on the version you are using.

This script bypasses YouTube's TrustedHTML policy and inserts a button with a spinner into the Polymer dropdown element (as seen in the image below).

Polymer Dropdown Example

Versions

  • yt_translator_restorer_open_in_newtab.js: This version fetches subtitles and opens them in a new tab for viewing.
  • yt_translator_restorer_download.js: This version fetches subtitles and allows you to download them directly.

Features

  • Manual Trigger: Click the "Transcription" button to view or download subtitles.
  • TrustedHTML Bypass: Handles YouTube's TrustedHTML policy to extract subtitles.
  • Polymer Button with Spinner: A button with a spinner is injected into the YouTube interface's Polymer dropdown element.
  • Google API Integration: Uses the YouTube Data API to fetch the video captions (auto-subtitles or the first available subtitle track).

How It Works

  1. The script fetches the subtitles for the current video using the YouTube API.
  2. It extracts the default subtitle track (auto-generated or the first available).
  3. In the open-in-newtab version, the subtitles are opened in a new tab for viewing.
  4. In the download version, the subtitles are downloaded as an SRT file.
  5. A spinner is displayed while the subtitles are being fetched.

Caveats

  • Editing Polymer is horrible: YouTube's Polymer elements can make dynamic content injection challenging. If any errors happen, please let me know.
  • Pop-up Blockers: Ensure pop-ups are allowed for the download or new tab to work properly.
  • No Download (in open-in-newtab version): This version only opens subtitles in a new tab; it does not download them.

Installation

  1. Install Violentmonkey (or compatible userscript manager).
  2. Add the script to your userscript manager.
  3. Visit any YouTube video, click the button seen in the image above, and click the "Transcription" button to view or download subtitles.

Credits

  • Thanks to Bret Donald for the solution that saved my life!