Compatibility Report

• Name of the game with compatibility issues: VRChat
• Steam AppID of the game: 438100

System Information

• GPU: RTX 4070 ti
• Video driver version: 575.64 (Happens in earlier versions)
• Kernel version: 6.11
• Link to full system information report as Gist: https://gist.githubusercontent.com/peq42/393183abd33859e4731c3a14140bf0ca/raw/1984b0cb3352694d92a96f1fc59b59221f12f689/gistfile1.txt
• Proton version: 9.0-4

I confirm:

• [X] that I haven't found an existing compatibility report for this game.
• [X] that I have checked whether there are updates for my system available.

Symptoms

Upon openning VRChat and going to any world with a video player, audio plays but no video is shown. It works fine on my other AMD system but not my main NVidia one. There seems to be a custom proton version that fixes it, but the one offered by valve doesn't work.

Custom version in question: https://github.com/SpookySkeletons/proton-ge-rtsp/releases
More about it: https://lvra.gitlab.io/docs/vrchat/

Reproduction

1. Open VRChat and login
2. Go to any world with a video player(Such as popcorn palace)
3. Input a youtube video
4. Audio plays, but no video is shown(if you have Nvidia)