Your videos are not optimized for anything.
[These are all my impressions based on your "Randomising Far Cry 4" video.
- There are absolutely no tags on your most recent video which is detrimental to your potential success.
- Your microphone audio is sub-par and using Audacity to clear up fuzz noise and boost treble/base tones would be a welcome addition.
- You don't have custom thumbnails.
- You don't explain what your video is about in the description, and I'm certain it would be better to put your "last two videos" in an annotation of an end card.
- Your in-game audio is also sub-par. It shouldn't be.
- The video has absolutely no editing detrimental to the entertainment value since you're not constantly talking about something.
- I think there is someone else there, but I can hardly hear him.
In summary, you are a gaming channel that's not doing anything to stand out among the rest.
That's my brutal honesty.