For one thing, try making thumbnails for your videos and more intriguing titles. For example, if you got an awesome CoC raid, then name the title, "Best Clash of Clans Raid Ever!". What helped my channel get boosted in the right direction is that I found a server with around 300 players on it daily. I started recording videos on there and advertising them on the server website. I noticed a growing audience. I also made a 50 sub special, and made people subscribe to me! I gained about 10 subs from that awesome giveaway.

I hope this helped!

Post things that people want to see.