Youtube Transcript English

YouTube Transcript English

Use this skill when a YouTube transcript must come back in English.

Source

• Upstream repository: https://github.com/jdepoix/youtube-transcript-api
• Integrated source commit: 85c859450c014d860297ab9fd4f88145c47ff2e2
• Local checkout: %USERPROFILE%\.youtube-transcript-api\youtube-transcript-api
• Isolated venv CLI: %USERPROFILE%\.youtube-transcript-api\venv\Scripts\youtube_transcript_api.exe
• English-enforcing shim: %USERPROFILE%\.youtube-transcript-api\bin\youtube-transcript-english.cmd

README-Grounded Usage

The upstream README states that YouTubeTranscriptApi().fetch(video_id) defaults to English, accepts languages=['en'], supports TranscriptList, and can translate transcripts with transcript.translate('en') when translation is available.

Use the bundled English wrapper first:

& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\python.exe" scripts\fetch_english_transcript.py "https://www.youtube.com/watch?v=VIDEO_ID"
& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\python.exe" scripts\fetch_english_transcript.py VIDEO_ID --format json --output transcript.json
& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\python.exe" scripts\fetch_english_transcript.py VIDEO_ID --format srt --output transcript.srt
& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\python.exe" scripts\fetch_english_transcript.py VIDEO_ID --ai-model gpt-4o-mini

Equivalent direct command:

& "$env:USERPROFILE\.youtube-transcript-api\bin\youtube-transcript-english.cmd" VIDEO_ID --format text

Use the upstream CLI when exact upstream behavior is needed:

& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\youtube_transcript_api.exe" VIDEO_ID --languages en --format json
& "$env:USERPROFILE\.youtube-transcript-api\venv\Scripts\youtube_transcript_api.exe" --list-transcripts VIDEO_ID

English Output Policy

1. Request direct English captions first.
2. If direct English is unavailable, inspect available transcripts.
3. If a transcript is translatable to English, translate it to English.
4. If YouTube cannot provide English, fetch the best available source transcript and translate caption segments to English with an OpenAI-compatible model.
5. If no transcript exists or AI translation is required but OPENAI_API_KEY is not set, fail clearly instead of returning a non-English transcript.

Add --no-translate to require direct English captions only. Add --no-ai-translate to allow YouTube translation but disable AI translation fallback.

AI translation settings:

• OPENAI_API_KEY is required only when AI translation fallback is needed.
• OPENAI_TRANSLATION_MODEL or AI_TRANSLATION_MODEL can override the default model.
• OPENAI_BASE_URL can point at an OpenAI-compatible endpoint.
• --ai-chunk-size controls how many caption segments are translated per request.

References

• references/source-readme.md contains the full upstream README.
• references/requirements-lock.txt documents installed dependencies.
• references/source-metadata.json records the integrated commit and local paths.

Reliability Notes

• YouTube can block requests from some IPs. The upstream README documents RequestBlocked and IpBlocked behavior and proxy options.
• The library uses an undocumented YouTube web-client API, so live behavior can change.
• For bulk or repeated fetching, respect rate limits and avoid unnecessary retries.