I wonder if the real killer app is Googles hardware scale verses OpenAi' s(or what Microsoft gives them). Seems like nothing Google's done has been particular surprising to OpenAi's team, it's just they have such huge scale maybe they can iterate faster.
A good dataset to train on. Now if after a Zoom call collegue ask you to like their video and subscribe to them on YouTube it would look a little suspicious.
So, it's true that IP law is going to have some catch-up to do with applications to machine learning and how copyright works in that world.
Nonetheless I'd be really worried if you were working on a startup whose training process started with "We'll just scrape YouTube because that is for all intents and purposes public data".