I don't know whether it's a new YouTube "feature" or whatsoever that can trick ad blockers, I get the following now:

It happens randomly with various YouTube videos.
Just browse the YouTube and start watching videos...
Ad-free videos?
Please see screenshot in "Description".
Wrong repo. Update your filters.
No idea how this project works; anyway, if an operator can move this to the appropriate repo, that would be nice.
Else, feel free to close this ticket; I just wanted to report this issue, that's all.
If you update your filter lists do you still get a white screen?
Most helpful comment
See https://www.reddit.com/r/uBlockOrigin/comments/ht4o9h/youtube_adserrors_solutions/