The title is of course, a reference to R. Buckminster Fuller's 1930s prototypes. While the 'stilt-jet' VTOL capability got all the press, omni-directional meant land/sea/air.
I've always thought an amphibious car would be more practical than a car, boat and trailer. The pinnacle for me has always been the Schwimmwagen. Here is an Oztralian who took the Jeep equivalent, the GPA 'Seep' around the world:
Ten years of misery, bobbing up and down, to return to a fickle and uncaring public.
So... anyways. How would you do an amphibious car?
Give the GPA a finer bow and air-bags or hydraulics to retract the axles?
A Schwimmwagen with increased fineness ratio and a U-boat conning tower?
Something else entirely? An FUV with a float conversion?
At the very least, the guy in the video could have built a cabin over the engine bay and doubled the interior space.