A considerable amount of playback failures in VRChat is reported by players in Japan, within the week.
Some claimed to resolve the problem by either disabling IPv6, or using a proxy service e.g. Cloudflare WARP.
Essentially people are being banned as a bot using yt-dlp via VRChat.
I wonder if VRChat can allow players to pass certain arguements to yt-dlp to
  • provide their cookies (--cookies)
  • or disable IPv6 (-4)
Because to my observation, it does not work even if you create yt-dlp.conf in %userprofile% or the same folder with the yt-dlp.exe installation under VRChat.