OK I admit its pretty cool.
And it does look like quite a lot of detail design has taken place (They made the video after they got the bits designed, not before). It neatly sidesteps a lot of the issues of the V2H and H2V transitions. Its payload is 5x that of the SnowGoose. IIRC 3000lb is a load for a HU1. And its design (and would presumably be built) in the good ol' US of A.
There are a lot of complex moving surfaces and joints. They have to work in sequence. Failure of the undercarriage extend and retrack process would probably stuff you quid badly.
The used pallet pickup sequence and the hillside drop both look very tricky to program a control system for without some sensors to guide it. Tipping a payload out of the side, and adjusting to compensate for the asymetric loads afterward looks kind of challenging as well. Incidently is the payload carrier already available, or is that another part of the design?
And the ex US Marines I've met would find evac in those shipping containers a fairly tight squeeze. I know its not *meant* to carry people but the USMC seems to be able to improvise quite well, and there's always V2.0 to think about.
And of course how much does this cost compared with a SnowGoose?
I wish them good luck and hope they survive the exciting world of defense procurement practice.