This is probably just me but you know what bugs me about a lot of YouTubers?
"Hey guys" : Of all the Greetings to people who aren't there you use that?
"My name is Youtubegamer" : Yes I know your name It's literally right there I know who you are you don't need to tell me.
"Today I'm going to be playing/showing" : Yea I know what you're doing It's in the title. Why are you giving me this information I already know?
This might just be one of the few social conventions I don't get, But It probably just annoys me because so many People do it, especially kids who just watch big YouTubers and Copy what they do.
So maybe I'm just weird.

