I thought it was a scaled prototype first time I saw the video.
The flight jerkiness probably comes from the flight controller not being super polished, and also the aircraft being piloted remotely by a drone pilot, so the pilot doesn't have the same feedback an onboard pilot would have.
Mind linking us to a some of the myriad of vapourware please? Just haven't seen that many EVTOL aircrafts successfully fly, like the heaviside shows, but maybe I have not been paying attention.