No they do not have that right. They do not have the right to try to circumvent what I'm telling my browser to do. If they don't like what it's doing, they can block me from the platform.
At the most fundamental they have the right to send or not send video data to you.
They could very easily just ban ad blockers from the Chrome extension store, but they haven't
Serious people use Firefox and uBlock Origin.
im sure that's for antitrust reasons.
Problem is Google also controls what used to be called "user agent".
I use Firefox and uBlock Origin
And they too, to try to stop people using their platform from doing so.