VRChat video proxy

GET /video?url=<video page url>
  Downloads via yt-dlp (h264/aac mp4, up to 1080p), caches it, and
  serves the file with Range support. First request per video is slow.

GET /redirect?url=<video page url>
  Resolves the direct media URL and 302-redirects to it. Instant, but
  limited to progressive formats (often 720p max on YouTube).

GET /status
  JSON: active downloads (progress/speed/ETA), recent history, cache usage.