MP4 Solution

[D3g3n]

Have there been any solutions to watching mp4 videos on different sites through wd?

[wilsontulus]

Until @montoyo comes back to WebDisplays community, someone named @ds58 forked MCEF and upgraded it to the newer Chromium version (v.100 as of 9 June 2022), and also released macOS and Linux compatible versions.
More details can be found below:
#73
https://github.com/ds58/mcef/releases

[wilsontulus]

You can convert your H.264 / MP4 videos to VP9 or WebM to make the videos playable. Alternatively for MP3 / aac audios you can convert them to OGG.

[ds58]

I am working on a completely new mod that supports proprietary codecs.

It isn't finished, or even released. But you can follow the progress here https://github.com/CinemaMod