In my iPadPro running the iPadOS 26.4.2 I can watch YouTube without ads and creating my own cues (a feature that is supposed to be available only in payed subscription) by using Firefox. At times the thing tries to open (and opens) the YouTube App, but it just takes to close it, then correcting the URL in the browser to just go to YouTube.com, without all the crap that they add trying to force using the App.
For some reason using Firefox, even lowering the security restrictions, the “continue” button wouldn’t activate. Switched to Chrome, then it run smoothly. Now they’re stealing my data