DasJott that's information from 2018, google initially made hardware accelerated video available for the case of chromebooks and have only now extended that functionality to linux general.
As far as I understand if you follow the instructions right it should work on intel and amd (you'll need a couple of ugly patches to libva-vdpau-driver for it to work on nvidia). There are a couple of things on our end that may prevent it from working. Our libva and libva-intel-driver are outdated. Additionally, no one has bothered to package and test the intel-media-driver for Intel broadwell (required for coffeelake+) and newer (in the case that libva-intel-driver doesn't work for any reason).
I would try starting from zero, make sure libva-intel-driver libva-utils are installed and running vainfo to confirm hardware acceleration is available. Then recheck the steps for enablement is chrome.
edit: update got it working on the nvidia proprietary driver with a patched libva-vdpau-driver. I can push a few updates post sync today to hopefully help out a few people.
