This doesn't make sense to me. There's enough content negotiation out there that AV2 will need a new content-type parameter. Feature detection is important to browsers.
I don't think so. WebM doesn't need new content type and it can ship AV1 and VP9 all the same.
I don't think so. WebM doesn't need new content type and it can ship AV1 and VP9 all the same.