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Huh? Have you noticed the stats of how much video is uploaded to YouTube? I won't provide any numbers, due to working there, but a back of envelope calculation should answer the question "how much money does it cost for Google to encode at twice the compute cost".

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I think it used to be that Google encoded every video in H.264, but also encoded some videos in VP9: the popular ones. That made a lot of sense--no need to dedicate a lot of encoding power for every video when quick-and-dirty x264 will get the job done fine for >99% of them. And I assume the same will be true for AV1, where only a small percentage of videos will actually be encoded in it. So my envelope calculations aren't going to help me gain much insight.

All are VP9 now.

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