I find uBlock works well at blocking YouTube ads but occasionally I get a static screen in the video player that says something like “Service not available at the moment.”.
YT seems to be intermittently blocking UBO users.
I never reproduced such issue on my side, so unfortunately there is no way for me to investigate -- given that this affects different blockers with different code base, I suspect a filter issue.
Disabling it temporarily always fixes the problem, so I have assumed it is due to UBO blocking something which if YT sees has been blocked enough times for a specific visitor, they will prevent video from loading, but maybe my hypothesis is incorrect. This only happens when I’m watching a lot of YouTube videos one after the other.
I seem to recall that if you disable uBlock on a site, you have to reload for the change to take effect. Is it possible that the page reload and not disabling uBlock is doing it?