HEVC isn't supported in Webcodecs at present except in Nightly for Linux. It has not made it to beta from there for the last few releases. How long before it will be available for Webcodecs in a full release?
HEVC is working on Linux for MSE (codec string passed to addSourceBuffer) based video for Firefox 137, 138 beta and Nightly. The problem is that I'm developing an application which is directly using the VideoEncoder and AudioEncoder. Only Firefox Nig...