Bug#947207: chromium: Video is garbled on twitch.tv, most other video sites

[nurupo]

Since the VAAPI patch is originally taken from Arch Linux, it might be
worth while to check if they had any issues with it on Chromium 79.
Looking at the comments and changes in
https://aur.archlinux.org/packages/chromium-vaapi it looks like they
did, and they have fixed those issues by updating the patches and
requiring a specially patched libva-vdpau-driver for Nvidia GPUs.