I don't see how that would have helped him. After having his lawyer review the terms of service (which is probably superior to reading it for himself), apparent

I don't see how that would have helped him. After having his lawyer review the terms of service (which is probably superior to reading it for himself), apparently he's concluded that there's nothing he could have done to prevent this from happening. He was using Youtube, and that limits his ability to shop around for better terms of service for ads.