OK, so here are some things you could do to improve, keep in mind im being picky and your channel is good as it is but everyone has room for improvement right?
1. Your channel art is a bit basic, it needs to stand out and tell people what your channel is about, in your case fifa and CoD mainly.
2. Your picture is a bit hard to read, maybe make it a minion or something, try and keep everything in touch with you name.
3. Make thumbnails for every video and try to make them a bit neater, the ones you currently have are a bit all over the place. There are tons of videos on youtube showing you how to make proffesional thumbnails.
4. Get social media if you're allowed. You should definately get things like facebook, instagram, twitter, reddit etc. These will boost your viewer base dramatically (as long as you're active on them).
Thats pretty much everything I could find