feat(youtube): bundle po_token provider + adaptive preview (age-restricted playback)#103
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…icted play) Age-restricted videos authenticate fine (cookies pass the age gate) but YouTube serves the authenticated web session SABR-only formats — no progressive stream, and the plain adaptive URLs need a PO token to be downloadable. No single client gives both age-pass and a playable stream, so instant-stream (progressive) can't serve them. Two pieces, together, make them play: 1. po_token: bundle the bgutil provider (node server, multi-arch, started by the entrypoint on 127.0.0.1:4416) + the yt-dlp plugin (requirements.txt). yt-dlp then fetches a PO token automatically, making the authenticated adaptive formats downloadable. Validated in the built image: provider serves v1.3.1, plugin loads, full stack boots. 2. Adaptive preview: download_preview falls back to muxing a <=480p video+audio pair (with --merge-output-format mp4) when no progressive format exists, so the existing cold-press -> preview fallback yields a playable file for age-restricted videos. Timeout raised 120->300s for the full A/V pull. Non-age videos are unchanged (instant-stream via the android client). Graceful degradation: if the provider doesn't start, the plugin just skips the token and non-age playback is unaffected. 321 passed; ruff clean; arm64 image built+booted locally, amd64 covered by the multi-arch base images + CI. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Makes age-restricted videos play, the deepest layer of the "won't play" saga. Cookies authenticate fine, but YouTube serves the authenticated web session SABR-only formats: no progressive stream (so instant-stream can't serve them) and the adaptive URLs need a PO token to download. No single yt-dlp client gives both age-pass and a playable stream — so two pieces work together:
1. po_token (the unlock)
brainicism/bgutil-ytdlp-pot-provider(Debian 12, same base; multi-arch amd64+arm64). Started by the entrypoint on127.0.0.1:4416.bgutil-ytdlp-pot-provider) to requirements. yt-dlp then fetches a PO token automatically, making the authenticated adaptive formats downloadable.v1.3.1), plugin loads, full stack boots withStarting po_token provider....2. Adaptive preview (the playback path)
download_previewnow falls back to muxing a<=480pvideo+audio pair (--merge-output-format mp4) when there's no progressive format — so the existing cold-press → preview fallback produces a playable file for age-restricted videos. Timeout120→300sfor the full A/V pull.Notes
321 passed, ruff clean.
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