Today I got an update for brave browser from 1.30 to 1.31 and hardware acceleration (vaapi) no longer works.
Go to a Youtube video, go to More tools > Developer tools > media > Players and see that hardware video decoding is not available. Likewise intel_gpu_top show 0 % for video.
Before the update hardware decoding was working nicely.
I started brave-browse with the command (which I put in a wrapper script)
LIBAV_DRIVER_NAME=i965 /usr/bin/brave-browser-stable --use-gl=desktop --enable-feature=VaapiVideoDecoder
OS is Ubuntu 20.04. Intel HD graphics 4000 (IVB GT2)