There is a difference between downloading a few videos and having access to ALL of them.

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.

A very wry observation! I wonder how fake videos will expose themselves in novel ways like this.

Not to mention all the metadata buried inside their internal api

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".