I've noticed that *not using* youtube for a while gets you ublocked, too. Which is only good, if you think about it. Most often (even if not always), your days will get a bit healthier, and the lifting of the block is only a bonus when you really need that rare video, too.

I haven't found other solutions or tricks; nor have I tried after I've realised that this one works. I take it as a "hint" from google, to get away from the screen (YT) for a few days.