The video appears to show the upper connection to the shaft to be a slip collar that goes over the shaft and allows it to rotate and stabilizes it. The actually attachment is on the motor housing and that stays stationary. It looks pretty slick, but I'm not sure it looks $250 slick.
The other choices are apparatus that attaches to the boat hull or use the original transom mount version of the 360.
Humminbird Helix 12 SI, 1198c SI, 1198c SI, ONIX 10 SI NT, 360, RC-1