That sounds illegal

Nearly everyone I know watches YouTube in some kind or another regularly. Most of them on a smart TV or mobile with ads. I think the amount of people watching youtube regularly is vastly higher than the amount of people just watching it when they get sent one video. Espechially since most people use phones to communicate with others and will watch the Videos sent to them with that device and the original YouTube App.

I don’t think it will piss off people enough to a point that Google will care. There will be a very small amount of techy people that will always try to circumvent this but the vast majority of people will deactivate AdBlock or buy premium.