Its working for me now, I tested it this morning. Even tried swithching the user agent back to Firefox and yep - Youtube gets magically some buffering problems with it.
Close youtube tab, switch user agent back to chrome, clear cache and restart the browser: no buffering problems. What a bunch of assholes.
I’ve reported this earlier to EU competition ombudsman, like a about a year ago, and they confirmed then that they were getting reports about the issue, Google of course denying the practice. Hopefully they are working on some punishment for Google in the background.
And in the present I’ve fallen back to using flash drives, because every cloud file hosting service is unreliable or a privacy nightmare. History is like a usb stick you keep rotating until it fits.