Google actually has the means to close off their mobile APIs, because trusted computing has completely taken over the mobile world, this would just leave the web browser version of YouTube wide open...
And then they could hit us with something like requiring a high security level of widevine to view higher resolutions, embedding ads in the video stream, or heck maybe they'll bring back web integrity and bully others into adopting it so they get a "usable" YouTube experience
Microsoft has actually opened up this possibility for them in a couple years thanks to windows 11 requiring TPMs to be turned on
We're talking a 65% attack on the web here
Sure nothing is unbreakable, but nobody's gonna torrent random YouTube videos, so the capacity to make the experience unbearable is there