Hello @sorathecrow, please add PROTON_LOG=1 %command% to the game's launch options, reproduce the issue, and attach the generated $HOME/steam-$APPID.log to this issue report as a file. (Proton logs compress well if needed.)
I reinstalled the beta channel and tried to relaunch the game and now it won't even boot. I added that command to the launch options but I can't find where it is being stored.
It is working now, I needed a space between the 1 and %. The video is playing with sound now too on the beta channel. I tried everything I could think of, validated both the game and the proton files, redownloaded, moved to internal storage, etc. None of it worked. But for some reason switching to stable channel then going back worked.
Compatibility Report
System Information
I confirm:
Symptoms
Intro video loads on Proton Experimental fine when using Stable OS Update Channel, but on the Beta channel it plays a color calibration clip.
Reproduction