ublock origin is so good at blocking YouTube it almost makes me think the developer is affiliated somehow. Their other extension, umatrix (which has more or less the same functionality just laid out differently), never really worked for me, but as soon as I add ublock origin it works perfectly.
It probably wouldn't be too hard to export from uBlock and import into uMatrix. I generally prefer uMatrix, even though it's technically discontinued. Even when you put uBlock into Author mode in the advanced settings, it still only really lets you choose by domain instead of splitting it down into scripts, XHR, frames, etc.
I was asking because if gorhill doesn't maintain any block lists then the conspiracy that he has inside information from youtube is nothing more then a conspiracy.