This past year at Burning Man, 600 drones light up the sky -- accompanied by live piano music -- one evening in a beautiful "flying sculpture" called "Franchise Freedom." This is the recently-released film of the piece made by its artists at Studio Drift. As dusk fell over Black Rock City, 600 luminous drones rose into a hypnotic display of technological choreography, accompanied by the poignant keys of Joep Beving.