If I could suggest something here, I'd be for you to learn some skills involving video editing. My main concern is since most videos of Pixel Gun 3D tend to be created as a lengthy clip of 1-2 matches with uninteresting commentary, you'll perhaps get the same results from gathering clips from your soon-to-be collaborators. Adding some music, editing out non-interesting parts of the videos, etc. would make them much more appealing. Perhaps you could read online or go to your local library for some books on the subject of video editing.