Ah, it seems #AV1 got finalized for realsies and will be playable in both chrome and firefox soon: https://www.chromestatus.com/feature/5729898442260480
This is at base interesting for #peertube as it is a nextgen royalty free codec(format to store videos), but it is also sorta important for us Krita devs to keep track of because much like hevc has heif, av1 will have avif, which would be a sort of nextgen jpeg.