First thing I'd fix is the orientation of the camera, you're not in the center. And I'd also try to get rid of much negative space as I could. If you can trim the edges of the facecam, if not just zooming in a bit more. The music is a little loud in relation to your voice, sometimes it makes it hard to understand you. The audio and visual quality is all very good, no problems there. I never really grasped the main point of the video, but I don't follow Overwatch, so I wouldn't be your typical viewer. But you're funny, you have good chemistry with talking while recording, mainly just your volume in relation to the music makes it difficult to maintain focus, just make it a tad lower, or your audio a tad higher. I think people that like Overwatch would be likely to subscribe, not me personally, if you could make the video more accessible to people who don't follow Overwatch you may get more subs. But I assume this isn't your first Overwatch video, and most of the time the first in a series will warrant more views and subs than later episodes of it.