Researchers analyzed more than half a billion YouTube recommendations that were made after users clicked on one of YouTube’s negative feedback tools, such as the Dislike or Don’t Recommend Channel buttons. “These are the tools YouTube offers for people to control their recommendations, but how does that actually impact your recommended videos?” Pressing Don’t Recommend Channel would stop only 43 percent of unwanted video recommendations, according to Mozilla, while the Dislike button stopped only 12 percent of recommendations users did not like.