Operating System: Manjaro Linux
Compatibility: Proton Experimental
Betas: x86-64 - Chromium + 64-bit binaries

After pressing E on the Media Player, it only shows a white screen.
If I hold C while looking at the screen, I can then click on +Add Media.
Once again, only a white screen is shown but this time with an available address bar on top and a button to search for media.

If I paste a youtube link into the address bar, I can then click on the "Request URL" button.
The title of the video will appear in the Media Player list, but the screen remains white.
Those on Microsoft Windows OS can see and hear the media.