I don't think so. WebM doesn't need new content type and it can ship AV1 and VP9 all the same.
What are you talking about? Video formats have a whole mad type parameter for this stuff https://jakearchibald.com/2022/html-codecs-parameter-for-av1...
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What are you talking about? Video formats have a whole mad type parameter for this stuff https://jakearchibald.com/2022/html-codecs-parameter-for-av1...