Actually i think that is a Hind, a heavy lift Russian chopper, like a Chinook or Sea King. It is not an Apache, look closely, that thing is gigantic, it has got rows of windows.
It is possible the camera is taking the images so slowly it shows up as very slow rotor movement. The yaw prop is moving at a different speed than the main prop, so that explains why one moves while the other doesn't.
More likely is some dude fucking around with a model or an RC, some fishing line, and a soundboard. The sounds are not tracked to the video, the doppler effect is not happening entirely right and if the engine was going but not the props it would not sound like a helicopter, it would sound like a revving engine.
Whichever is the case, not gonna happen IRL I assure you.
The lawnmower was fucking epic though...