Since youtube has been out for what is approaching 7 years and 100000+ terrabytes of content has been uploaded, it is becoming increasingly more difficult to gain a permanent audience in the youtube community, even if you do appeal to the theme. A new guy has to not only compete with the veterans (who have their videos with high views pushed to the top of a search list), but many other hopefuls as well. While it may seem that viewers believe popular commentators don't deserve their popularity, they have to understand that they must make the Let's Play interesting. If you're just going with the flow and presenting the game as-is with monotonous voice-over, that can get boring as hell. You can see how commentators like Uberhaxornova and Seananners get around this problem. They are obviously gamers, but they are also skilled ACTORS; they are proficient at improvisation and witty dialogue on the spot.
Secondly, they have to understand that their subscribers are a collection of users who CHOOSE to subscribe to them. It's a no-brainer, but if you're someone who spends time on Youtube, you find that brains are in short supply there.
So I can live with both of those problems. I can't, however, contain myself when users come up with the idea that Let's Plays of video games are 100% their [the commentators'] property, thus anyone else who decides to do a Let's Play of the same video game is guilty of "plagiarism" and "leeching of funds". It boggles my mind. They aren't Reply Girls who latch unto each other's videos in hopes people will watch theirs and receive money from it; it's their own special perspective on a video game which has no similarities to another.
Here's Nova's perspective on the gaming community nonense