Probably a franklin motor with a propeller attached to the end of it. I sell some fountains with the same concept. Air-o-lator.com you will see the propeller type fountains that move a lot of water 400 gpm like the guy was describing in the video.
I can get you a motor and a propeller if you would like to try and build one. email me and i can work on a price Cbowman@polydrip.com