I can watch 20 fucking hours of content about a subject, and it wont suggest anything similar.
but I accidentally click a link someone posts to a crazy right wing video, I get nothing but right wing violence and brainwashing fear mongering videos for over a week that I can barely break the fuck out of with hyper specific searches.
Which is the same problem facebook has, in that the algorithm favors right wing extremism and shoves people heavily down that path, and only through very significant and concerted effort can you break out of it.
And if I happen to click on those videos only to confirm it’s not for me they will be like “omg, he’s crazy about this video! Let’s recommend 10 different variations of this video from now on!”
I've recently started getting the most random, low-view localised content from small channels even though I never watch anything in my native language or any content like what they are producing.