Operator-flagged 2026-06-01 (DaferQ patreon, event #38919). Video posts
hosted on Mux carry a JWT that encodes a playback restriction policy
(`playback_restriction_id` in the token). The token signature alone is
not sufficient — Mux's CDN ALSO checks Referer/Origin on every fetch.
gallery-dl's HEAD probe to `stream.mux.com/<id>.m3u8?token=...` returns
200 (token is valid, HEAD sends no Referer that Mux's policy rejects),
but when yt-dlp follows up with the actual manifest GET it sends its own
default Referer and Mux 403s. yt-dlp retries 4 times, gives up, the
single video fails — every other image in the same post still downloads.
Static `downloader.ytdl.raw-options.http_headers` block now pins Referer
and Origin to `https://www.patreon.com` so yt-dlp's manifest fetch
clears the policy check.
Headers-only restrictions are now handled. Mux IP-range restrictions
(if a creator opts into them) remain unfixable from our worker — those
would need a Patreon-region IP. Per-video PARTIAL classifier (shipped
in plan #544 last commit) already handles the residual case: a run that
grabs all images and fails 1 video classifies as status=ok rather than
flipping the whole event red.
bvandeusen
66ff671f09