You guys are harsh! The guy on the video is talented with the call.. No need to bash on the man. To each his own.. I have heard much worse calling that ducks responded to. Had a guy in the blind with me sat doing that bouncing hen crap... He called in a couple greys while I was out of the blind. People claim it works, myself have never tried to learn it.
Im not bashing him... that takes alot of work to get that down for sure. Im just not sure it would be worth it. I dont think you would all of a sudden start killing limits of mallards everyday just because you were doing this crazy call routine