Stupid, stupid... the kind of thing I might have thought cool as an 11-year-old, but not today. Maybe of interest to an elementary physics class, to show how sound is transmitted through vibration of air.
Maybe you should warn people about the volume setting on that video, too: I was listening to a streaming radio station at modest volumes (using Sennheiser headphones), clicked on that link, and in half a second was tearing my headphones off and shutting down the tab (which I figured was faster than looking for the volume control); it's WAY TOO LOUD! [Unless the volumes of both sound sources were additive? Never happened like that before, though; I can't remember when something online ever hurt my ears like that. Uh-uh!] Folks, set your output volume down low, before clicking on that link!