Pale Moon forum

I'd just seen there are some commits that is working on AV1 support. I compiled with --enable-av1 and enabled "media.av1.enabled" in about:config.
It is working in test site https://demo.bitmovin.com/public/firefox/av1/ , but YouTube still thinks browser can't decode AV1 in https://www.youtube.com/testtube . Any thoughts?

It does not work on YouTube, because UXP does not support AV1 in MPEG-4 Part 14 containers, see Issue #853 (uxp).

Support in MP4 is being worked on by Travis.