Google has plenty of money, but it's never enough and so you get this kind of ridiculously hostile activity. I can't even watch my own videos without being bombarded by ads. That wasn't the case when I uploaded it so in my opinion that's bait-and-switch. They can pull these stunts on newly uploaded works with new T&C but to retroactively claim editorial control over the page where the videos appear is just abuse of power. If they were about to go out of business on account of how youtube is such a terrible loss leader it might garner some sympathy but as it is it is just a Google power play and a money grab to me.