Yeah those old fly wheel engines are neat. There was a BIG one that ran
the conveyor belt system for a packing house in Fort Pierce, Florida, for years, and they finally tore down the old packing house and built a new one with a modern electric engine. There is a guy here in Montana who has a small one about the size of the one in the video. They went under various names, hit and miss, one lunger's etc. There a lot of Fly wheel clubs around. If you remember the African Queen, with Humphrey Bogart, and Kathryn Hepburn, the boat they were on, the "African Queen", had a flywheel engine. Very simple concept, and quite effective. There were even washing machines that had them for their power. You just had to keep the little tank full of water to keep it cool.
Wayne