How YouTube’s Algorithmic Suggestions Work

YouTube wants to recommend things people will like, and the clearest signal of that is whether other people liked them. Pew found that 64 percent of recommendations went to videos with more than a million views. The 50 videos that YouTube recommended most often had been viewed an average of 456 million times each. Popularity begets popularity, at least in the case of users (or bots, as here) that YouTube doesn’t know much about.