That is giving Google's algorithms a frankly wishful-thinking amount of credit. Presumably based on not understanding that it just matches keywords and text pieces, rather than actually understanding what the video is about.
Point in case, my clicking on some lefty-stuff videos back in the day -- you know, feminist stuff, social issues, that kinda thing -- also made it quite persistent in recommending douchenozzles like Sargon Of Akkad. Because apparently, hey, he's flagged his stuff with those keywords too, so that must mean I'm interested, right?
It got better recently when they seem to have weighted the author more, but I click recently on a video which happens to mention him as someone promoting a wrong opinion, and guess who gets recommended to me again? Yep, Sargon Of Akkad. Because apparently for Google he's like Candyman: someone says his name three times, and he's there
Similarly, clicking on atheism related videos quite often produces recommendations in which some outright lunatic thinks he's totally defeated atheists, even if he has to preemptively proclaim it himself, by repeating the same nonsense I've heard a million times before. And of course he tagged it as "atheism", because why wouldn't every atheist need to see his magnum opus?
Again, this has gotten better lately, but it still happens.
I have no reason to assume that only for ghosts it would totally work differently.