Shardstone
Hero
It's not just the algorithm, it's what people want to see. People like mess and drama. They watch more mess and drama then they do wholesome education videos about games. They also like humor and unique or novel visuals, so videos do a lot of these too, and don't have to be messy/dramatic to succeed. But ultimately, this whole "rabble-rouser" stuff is just because that's ultimately what humans like watching: other humans and their problems.