It’s a ground effect hydrofoil sea plane inter island electric ferry concept, so it’s near its limit in the video.
Ground effect refers to a flight characteristic noticed at low altitudes where the air below the wing compresses between the wing and ground, creating enormous lift with smaller wings or winglets. This makes them much more efficient, especially at lower speeds or with heavy loads.
The largest I know of is the Ecronoplan- https://en.wikipedia.org/wiki/Lun-class_ekranoplan)

Here’s a bit more info
https://www.hawaiiseaglider.org/

Many “birds” make use of this flight characteristic to save battery power during long term surveillance flights, especially just offshore.

This thing looks so inherently unstable and 'over-engineered' if that's a thing. Why two fuselages? And on the drop ship: I'm a big fan of the delta wing, but why the huge vertical stabilizers/rudders on the tips? Doesn't that kinda kill the flow? Even modern delta wings will only sport small winglets at most. Oh, and get a load of that nose wheel - looks ready to snap.

I wonder if the rudderish thing that is used for steering acts as a vertical stabilizer? If not, he could add some vertical winglets or something.