Going by the activities in the video, this is obviously some sort of social event organised by at least two schools. The girls seem to be wearing one uniform and the boys some other type of uniform so I suppose it is safe to assume that a boys only and girl only school decided to have a joint event.
What bothers me however is that majority of the girls seem to be behaving outrageously. Loads of the boys in the video seem sane (with the exception of the few indulging in this crazy dancing) but the same cant be said for the girls in the video. Could it be something in the water they drank? Does anyone have any idea which schools these students are from or the event?