Recover transcripts from YouTube videos when running from a cloud/datacenter IP where YouTube blocks all standard endpoints (youtube-transcript-api, yt-dlp, Invidious, Piped). Use whenever the primary youtube-content skill's helper script fails with RequestBlocked, IpBlocked, LOGIN_REQUIRED, or zero-byte VTT, or whenever you see 'Sign in to confirm you're not a bot' from yt-dlp.
