On the computer attached to my stereo YouTube shows me almost 100% conservative, boring, safe but good music recommendations -- all things I've liked before, it rarely tries to show me anything new or challenging.

On another browser it shows me mostly videos about stereo equipment.

One yet another it shows me a mix of videos aimed at someone who listens to The Ezra Klein Show. That browser and the previous browser sometimes get a burst of videos about "How Brand X has lost its way" or "Why Y sucks today".

One time on shorts I clicked on a video where an A.I. generated woman transforms into a fox on America's Got Talent and then after that it wanted to show me hundreds of A.I. slop videos of Chinese girls transforming into just about anything on the same show with the same music and the same reaction shots.

If you click on a few Wheat Waffles videos you might quickly find your feed is nothing but blackpill incel videos and also videos that apply a blackpill philosophy to life such that not only is dating futile but everything else is futile too.

The conclusion I draw from it is that you can't easily draw conclusions about the experience other people have with recommenders, it's one reason why political ads on social are so problematic, you can tell baldfaced lies to people who are inclined to believe them and skeptical people will never see them and hold anyone to account.