I've actually ended up writing this, ironically, because AdBlocker failed and I've come seeking answers. As of a few hours ago, YouTube adverts are getting through. Prior to this, AdB (U) has worked beautifully. When I have to use a computer without any AdB; I am deeply struck by the sheer ugliness of the whole (I know) internet, with every square centimetre, flashing adverts at the viewer, like a scene from 'BladeRunner'. AdB Ultimate has made all that ugliness go away. I hope I can get a YT fix, otherwise, I'll, ...I'll ....just have to do without one. , I guess