I feel like the headline is seriously misleading. The TL;DR is basically "the authors observed pockets of several hundred people spontaneously behaving like one

I feel like the headline is seriously misleading. The TL;DR is basically "the authors observed pockets of several hundred people spontaneously behaving like one fluid that oscillated" over an 18 second period. That hardly seems to amount to "predicting crowd movements" in any meaningful sense.