DJ Cook is a YouTuber who makes commentary on YouTubers which he deems as bad. He does this as part of a campaign he calls "clean up YouTube" where he encourages his audience to also be against the people he comments on. He talks about various YouTube channels that he dislikes. He has talked about a lot of them by reviewing their videos and giving his thoughts about their channel. In his second channel, he reacts to his haters' videos or "toxic" people.