Did you notice the 4-wheel steering?
At one point, you can see all 4 wheels turned in the same direction, making the vehicle crab sideways.
At another point, it is seen turning a sharp corner, with the rear wheels pointed in, and the front wheels pointed out; this makes it turn in a very small radius.
The 1989-91 Honda Prelude had a similar system, driven through a weird gearcase in the back.
Is there any documentation on what kind of system the Snow Cruiser used?

Rumor has it that it was involved in the Miskatonic University Antarctic expedition.