Youtubers that stick to one game so so because the majority of their audience wants that sort of content. Most of them will lose views of they post other content that isn't related to Destiny. Look at SirDimetrious, for instance. He made a Battlefield 1 video a while ago that only brought in about 27K views, yet every video he has posted in the past month has over 40K views (some of them went as high as 90K). Also if you look at people like SirDimetrious or Kruzer, you would know that they stop at nothing to share their complete honest opinion, and the past few months have shown that they are highly critical of the game. Yes, there are Youtubers that are similar to what you have described, but not all of them are the same. There are plenty of others that I haven't listed that have a similar, rather critical outlook toward Destiny that isn't always positive.