We’re still working on re-enabling the tests, unfortunately much went stale or updated and broke them.
But as mentioned before, Chromium already has most of this upstream so in stable it’s just a matter of passing the flags we use in edge and beta:
chromium --enable-features=VaapiVideoDecoder,VaapiVideoEncoder,VaapiVideoDecodeLinuxGL,UseChromeOSDirectVideoDecoder --enable-native-gpu-memory-buffers --ozone-platform-hint=auto