5.You can now close thisabout:configtab if you like. To verify and see if a video supports and is using the AV1 codec, right click or press and hold on the video, and click/tap onStats for Nerds. If you seeav01forCodecs, then the video is using the AV1 codec. (see screenshots...
YouTube (and probably some other websites as well) uses VP8 or VP9 video codecs by default, and many GPUs don't support hardware decoding for this codec. The h264ify extension will force YouTube to use H.264, which should be supported by most GPUs, instead of VP8/VP9. This extension...