The mount on top of the flat panel cross member mounting bar is for the EVI-D70 crowd camera. The S-video cables in some of the pictures are for camera connection.
The camera is connected to a video mixer (Numark AVM02), left side - crowd cam; right side - VDJ output. That way I can pan/fade/mix at any given time from live crowd shots to music video or both. Using the Numark tri-LCD monitor (VM03MkII), like a TV director, I can see what each device is seeing and do the producing confidently. And all this "stuff" is fairly compact. Two SKB 10 x 8s on a 4' table.