You raise a good point. Maybe there should be an effort by creators to publish their videos on other platforms with different licenses too, therefore removing any advantage Google has in training AI using others’ content. Legalities aside, I find it really distasteful that Google can claim exclusivity over a use of the content that they were never owed. Let’s be honest - they probably granted themselves that legal “right” with some obscure update to their terms of service.

Creators are allowed to publish their videos under CC-BY licence.