Pewdiepie approaches gaming differently than other Youtubers. He plays a variety of different games from horror to romance. This is why Pewdiepie has gained so many subscribers and viewers.
One of the gamers that play Call of Duty is Mr.DalekJD. He is a youtuber that mainly plays Call of Duty. Unlike Pewdiepie, Mr.DalekJD prioritize gaming and mostly first-person shooter (FPS) games.
A Faze member, FazeRug, also plays Call of Duty. He operates similar to Pewdiepie. He mostly plays FPS games, but he also does vlogs on a daily basis to attract different kinds of viewers.
Good Games Entertainment Zone Podcast 