It’s pretty random whether you get the message or not. Some of my friends, including me, straight up cannot watch youtube on their website half of the time anymore, because it full blocks us. It’s not just an annoying message, videos actually just don’t play. But I only get it on some days. I think the message only pops up if you’ve been watching for more than like an hour straight. Then again, some of my friends have never seen the message. Who knows. Just more weird big tech server bullshit. Like how twitter’s api works 15% of the time (for me).
Purge cache and refresh does the trick if you have problems with the firefox+ublock combination. Or you have some other active extensions which prevents ublock from doing its thing.
Been watching for 3h straight and still no pop or problem with videos but when time eventually come I’ll try to setup UBO filter or using 3rd party frontend