No idea where this is originally from. Perhaps Peter at Bayou Renaissance Man might know. All I know is that it’s at least nine years old according to the YouTube upload I found, and that I was emailed a .wmv version a year later. (Does anyone still email videos anymore? It seems like everything now is just a link to a YouTube or YouTube competitor upload.)
All things considered, I’m not sure if this method is any safer than a regular Western handshake!