BlazeFalcon34

So I just recently got big box and I am already loving it so far. I just got the Unified theme and I can't seem to get the platform videos to work when I select a platform. Where do I place the videos at? I don't know if this has been asked before but I do need some help on this. It only shows it blank when I select a system. Also what is the preferred platform view for it to work proper?