Youtube Transcribe Skill

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name: youtube-transcribe-skill description: 'Extract subtitles/transcripts from YouTube videos. Triggers: "youtube transcript", "extract subtitles", "video captions", "视频字幕", "字幕提取", "YouTube转文字", "提取字幕".' allowed-tools: Read, Write, Glob, Grep, Task, Bash(cat:*), Bash(ls:*), Bash(tree:*), Bash(yt-dlp:*), Bash(which:*), mcp__plugin_claude-code-settings_chrome__*

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YouTube Transcript Extraction

Extract subtitles/transcripts from a YouTube video URL and save them as a local file.

Input YouTube URL: $ARGUMENTS

Step 1: Verify URL and Get Video Information

1. Verify URL Format: Confirm the input is a valid YouTube URL (supports youtube.com/watch?v= or youtu.be/ formats).

2. Get Video Information: Use WebFetch or firecrawl to fetch the page and extract the video title for subsequent file naming.

Step 2: CLI Quick Extraction (Priority Attempt)

Use command-line tools to quickly extract subtitles.

1. Check Tool Availability: Execute which yt-dlp.

- If yt-dlp is found, proceed to subtitle download. - If yt-dlp is NOT found, skip immediately to Step 3.

2. Execute Subtitle Download (Only if yt-dlp is found):

- Tip: Always add --cookies-from-browser to avoid sign-in restrictions. Default to chrome. - Retry Logic: If yt-dlp fails with a browser error (e.g., "Could not open Chrome"), ask the user to specify their available browser (e.g., firefox, safari, edge) and retry.

   # Get the title first (try chrome first)
   yt-dlp --cookies-from-browser=chrome --get-title "[VIDEO_URL]"
   # Download subtitles
   yt-dlp --cookies-from-browser=chrome --write-auto-sub --write-sub --sub-lang zh-Hans,zh-Hant,en --skip-download --output "

3. Verify Results: - Check the command exit code. - Exit code 0 (Success): Subtitles have been saved locally, task complete. - Exit code non-0 (Failure): - If error is related to browser/cookies, ask user for correct browser and retry Step 2. - If other errors (e.g., video unavailable), proceed to Step 3.

Step 3: Browser Automation (Fallback)

When the CLI method fails or yt-dlp is missing, use browser UI automation to extract subtitles.

1. Check Tool Availability:

- Check if chrome-devtools-mcp tools (specifically mcp__plugin_claude-code-settings_chrome__new_page) are available. - CRITICAL CHECK: If chrome-devtools-mcp is NOT available AND yt-dlp was NOT found in Step 2: - STOP execution. - Notify the User: "Unable to proceed. Please either install yt-dlp (for fast CLI extraction) OR configure chrome-devtools-mcp (for browser automation)."

2. Initialize Browser Session (If tools are available):

Call mcp__plugin_claude-code-settings_chrome__new_page to open the video URL.

3.2 Analyze Page State

Call mcp__plugin_claude-code-settings_chrome__take_snapshot to read the page accessibility tree.

3.3 Expand Video Description

_Reason: The "Show transcript" button is usually hidden within the collapsed description area._

1. Search the snapshot for a button labeled "...more", "...更多", or "Show more" (usually located in the description block below the video title). 2. Call mcp__plugin_claude-code-settings_chrome__click to click that button.

3.4 Open Transcript Panel

1. Call mcp__plugin_claude-code-settings_chrome__take_snapshot to get the updated UI snapshot. 2. Search for a button labeled "Show transcript", "显示转录稿", or "内容转文字". 3. Call mcp__plugin_claude-code-settings_chrome__click to click that button.

3.5 Extract Content via DOM

_Reason: Directly reading the accessibility tree for long lists is slow and consumes many tokens; DOM injection is more efficient._

Call mcp__plugin_claude-code-settings_chrome__evaluate_script to execute the following JavaScript:

() => {
  // Select all transcript segment containers
  const segments = document.querySelectorAll("ytd-transcript-segment-renderer");
  if (!segments.length) return "BUFFERING"; // Retry if empty
  // Iterate and format as "timestamp text"
  return Array.from(segments)
    .map((seg) => {
      const time = seg.querySelector(".segment-timestamp")?.innerText.trim();
      const text = seg.querySelector(".segment-text")?.innerText.trim();
      return ${time} ${text};
    })
    .join("\n");
};

If it returns "BUFFERING", wait a few seconds and retry.

3.6 Save and Cleanup

1. Use the Write tool to save the extracted text as a local file (e.g., ). 2. Call mcp__plugin_claude-code-settings_chrome__close_page to release resources.

Output Requirements

Save the subtitle file to the current working directory.

Filename format:

File content format: Each line should be Timestamp Subtitle Text.

Report upon completion: File path, subtitle language, total number of lines.