This article suggests that machine learning and collaborative filtering are incapable of producing healthy recommendations. I beg to differ, the New York Times may not like the result but they work for the vast majority of users on any service with too much content to manually curate.
YouTube is a _disastrously_ unhealthy recommender system, and they've let it go completely out of control.
My entire sidebar is now just a random assortment of irrelevant interests. For instance I wanted to learn to play a denser piano chord, I learned it ages ago but I still get like 20 videos that explain how to add extensions to a 7 chord, even if I'm watching a video on the F-35 fighter pilot.