How do I fix videos not loading on Proton?

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The original was posted on /r/linux_gaming by /u/redbullgivesyoumemes on 2023-06-27 23:48:17+00:00.

Every game I use proton with, the videos will not load. Any sort of MP4 file located in the games files refuses to load. How do I fix this issue? (I am using the "Proton Experimental" setting on Steam compatibility. I have tried to disable experimental and use a stable build, however the same issue still occurs.)