Technically, its amateur sports, played for recreation, refreshment and enjoyment. Anything that enhances that enjoyment, like having a staff member filming, does not make it commercial or professional. I assume that is the point. Is it commercial application, or part of amateur sports with no financial benefit? Let's not start a college athletics discussion, as I agree it is mostly a commercial endeavor, but technically, its amateur sports played solely for recreation.
If the participants are aware of the flight, and agree to it, UCLA could argue that it is a recreational flight only within the rules for model aircraft. If they are paying a professional photographer to film, all bets are off unless they are using one of the licensed commercial operators the FAA approved.