Very Cool, but I think I'd put a motor on it. He looked tired, but was smiling at the end of the song. Was he smiling because he was proud of his organ, or smiling because he didn't have to turn the crank any more? What was he switching just behind and below on the front with his left hand?
There is another woodworking forum called "Family Woodworking" where several members have built hand crank organs. Those interested might want to search that forum for more information
Central North Carolina