Interesting illustration of the two factors - ideas, and technical execution. I don't think anybody would start nitpicking the technical aspect here - it's good work. If there are technical flaws, these are completely insignificant/meaningless in the overall context. All these cameras are capable of superb output. This is a nice test of the cameras.
Another factor in using multiple cameras simultaneously was that we had very little time in the gym, it was open and we could only keep our lights on for about 10-15mins, also the lifters can only lift a couple of reps at a time so we had to get what we could when we could.