I feel like you may not get a lot of reviews because you are a gamer and there are so many that people just get overwhelmed and don't want to take the time because it's not often that there are different ones.
I am not a huge gaming channel fan, but I do know what I like to watch and I would like to help you out as much as I can if you'll let me.
-Your trailer could be a lot shorter. You don't really need to talk about how much you work or how much of a social life you have- you don't need to make excuses, ya know? I think that you could leave out why your name is 'Gibbo' and save it for an "about me' video so people can get to know you better through that. Just the whole thing can be shortened and sweet. I almost didn't want to sit through it if I am being completely honest.
-I'm not really a fan of your intro. It seems very generic for a gamer, and you really don't want that. I really like your channel art, but I think you can add what you are going to have on your channel up there too, so you don't have to list it that much in your intro- throw it in people's faces since you are new! So, definitely use up the rest of that space for that. I wish that your intro was like your channel art, though.
I do like that your videos are short. I think that is wise to do since you are a new gaming channel. You wanna leave them wanting more! lol
I hope this didn't sound mean or anything, and I hope this helped.