Why include a couple of frames promoting 'tripod shooting' using a C300 body and not the ME200S they're advertising? 01:01 on the first video. Plain lazy no?

Could anyone tell me whether USB sockets built into camera bodies, such as the one on a PMW 500 (primarily used for scene file transfer) is capable of providing power for a light such as this? It would make a nifty toplight alterntive if it were possible.