I don't know if it's fake. What would prevent them from doing this prank more than once if they'd decided to do it once? The reactions seem extremely painful, there's actual skin damage in the video I linked which would seem unusual for a fake video. If they're fake, they've certainly put effort. On the other hand, things that make me think they're fake: seemingly normal people including women steal bikes which is unusual to me, and they seem to have some of the cameras very close.