youtube-transcript
The youtube-transcript skill extracts timestamped transcripts from YouTube videos and reformats the content into summaries, chapter outlines, Twitter threads, blog posts, or notable quotes. Use it when processing YouTube URLs or when users request transcript extraction, video summarization, content conversion to text formats, or restructuring video content into specific output types like articles or social media threads.
git clone --depth 1 https://github.com/browser-act/skills /tmp/youtube-transcript && cp -r /tmp/youtube-transcript/solutions/video-platforms/youtube-transcript ~/.claude/skills/youtube-transcriptSKILL.md
# YouTube — Transcript Extraction & Content Reformatting
> YouTube video URL → timestamped transcript → summary / chapters / thread / blog / quotes
## Language
All process output to user (progress updates, process notifications) follows the user's language.
## Objective
Extract the full transcript from a YouTube video's built-in transcript panel, then transform it into the output format the user requests.
## Prerequisites
- Target YouTube video page is already open in the browser: `https://www.youtube.com/watch?v={VIDEO_ID}`
## Pre-execution Checks
### 1. Tool Readiness
If browser-act has been confirmed available in the current session → skip this step.
Invoke `browser-act` via Skill tool to load usage. If installation or configuration issues arise, follow its guidance to resolve then retry.
## Capability Components
> This Skill's operational boundary = what the user can manually do in their browser. It only reads data already displayed to the user on the page, never bypassing authentication or access controls. JS code is encapsulated in Python files under the `scripts/` directory, invoked via `eval "$(python scripts/xxx.py)"`. Use the bash tool for execution.
### DOM: Check transcript availability and list languages
`eval "$(python scripts/get-languages.py)"`
No parameters. Reads `ytInitialPlayerResponse` from the current page.
Output example:
```json
{
"available_languages": [
{"code": "en", "name": "English", "kind": "manual", "is_auto": false},
{"code": "en", "name": "English (auto-generated)", "kind": "asr", "is_auto": true}
],
"count": 2
}
```
Returns `{"error": true, "message": "..."}` when transcripts are disabled or page is not a YouTube video.
### DOM: Open transcript panel
`eval "$(python scripts/open-transcript-panel.py)"`
No parameters. Clicks the "Show transcript" button below the video (handles multiple UI language variants automatically for robustness).
Must call `wait stable` after this to allow the panel to fully load.
Output example:
```json
{"success": true, "label": "内容转文字"}
```
### DOM: Extract all transcript segments
`eval "$(python scripts/extract-transcript-segments.py)"`
No parameters. Scrolls the open transcript panel to trigger lazy loading for long videos, then extracts all segments.
Output example:
```json
{
"segment_count": 24,
"segments": [
{"ts": "0:18", "text": "We're no strangers to love"},
{"ts": "0:27", "text": "You know the rules and so do I"}
],
"full_text": "We're no strangers to love You know the rules...",
"timestamped_text": "0:18 We're no strangers to love\n0:27 You know the rules..."
}
```
### Composite: Full transcript fetch workflow
1. `navigate https://www.youtube.com/watch?v={VIDEO_ID}` → `wait stable`
2. `eval "$(python scripts/get-languages.py)"` — confirm transcripts are available; note the language list
3. `eval "$(python scripts/open-transcript-panel.py)"` — open the panel
4. `wait stable` — wait for panel content to load
5. `eval "$(python scripts/extract-transcript-segments.py)"` — extract all segments
Use `timestamped_text` from the output as input for the Transform step below.
## Transform: Content Reformatting
After fetching the transcript, transform it based on what the user requests. If the user did not specify a format, default to the **Full Document** — output all five sections in order.
- **Summary**: Concise 5–10 sentence overview of the entire video
- **Chapters**: Group by topic shifts, output timestamped chapter list
- **Thread**: Twitter/X thread format — numbered posts, each under 280 characters
- **Blog post**: Full article with title, H2 sections per major topic, key quotes, and takeaways
- **Quotes**: Notable quotes with their timestamps
**Default Full Document output order** (when no specific format is requested):
1. Summary
2. Chapters
3. Thread
4. Blog Post
5. Quotes
### Workflow
1. Fetch transcript using the Composite component above.
2. **Validate**: confirm `segment_count >= 1`. If empty, tell the user the video has transcripts disabled.
3. **Chunk if needed**: if `full_text` exceeds ~50,000 characters, split `timestamped_text` into overlapping chunks (~40K characters with 2K overlap) and summarize each chunk before merging.
4. **Transform** into the requested format(s) using the `timestamped_text` field. If no format specified, produce all five sections.
5. **Verify**: re-read the output for coherence, correct timestamps (if chapters), and completeness before presenting.
### Example — Chapters Output
```
0:00 Introduction — host opens with the problem statement
3:45 Background — prior work and why existing solutions fall short
12:20 Core method — walkthrough of the proposed approach
24:10 Results — benchmark comparisons and key takeaways
31:55 Q&A — audience questions on scalability and next steps
```
### Example — Thread Output
```
1/ Just watched an incredible video on [topic]. Key takeaways 🧵
2/ First insight: [point]. This matters because [reason].
3/ The surprising part: [finding]. Most assume [belief], but this shows otherwise.
4/ Practical takeaway: [action].
5/ Full video: [URL]
```
## Error Handling
- **Transcripts disabled**: `get-languages.py` returns error; tell user and suggest checking if captions are available on the video page
- **Private/unavailable video**: page will not load correctly; relay the error and ask user to verify the URL
- **Transcript button not found**: usually means the user is not on a video page, or the page hasn't finished loading; navigate to the URL and retry
- **No segments after panel opens**: retry `open-transcript-panel.py` + `wait stable` + `extract-transcript-segments.py` once
## Known Limitations
- Language selection: the transcript panel shows the language YouTube defaults to for the user's region. Switching to a specific language requires changing the caption language in the player's CC settings first; automatic language switching is not implemented.
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