*studies the video intensely*
The spherical "wheel" is driven by a smaller wheel pressed atop it which can be rotated by its Y axis (the horizontal axis) thus enabling the entire device to work via the use of only two motors, one that supplies power to the drive-wheel (the one atop the spherical main-wheel) and the second which rotates this drive-wheel's direction, thereby redirecting the first motor's energy, like how a tank's turret redirects it's direction of fire.
An elegant design, almost idiot proof, I could probably build one for a few grand.
It would be interesting to own one. I wonder how it would do in more harsh environmental testing though.
Hypothetically one could easily upscale the design, however performing the many small adjustments required to keep the device balanced when it's not moving would put great strain on the motor. But if I had the capital to cannibalize a motorcycle, order custom parts and there was a test driver/pilot insane/suicidal enough to ride it, I could build the world's first omnidirectional monocycle.
It does look kind of cool, I just wonder how the more clumsy of us would stay on one of those units. I can imagine a lot of face-plants.
If the centre of gravity was high enough, that would be practically impossible, it's not unlike how you can balance a broom on one hand quite easily, the high centre of gravity retards the tilt rate. Now with the upscale motorbike engine using design, the driver would be safest at about 12ft, however a 6ft design wouldn't be impossible, the motor would just wear out very quickly.
*continues mumbling to himself about how some manner of flywheel and gearbox would be nessecary to reduce engine wear and increase overall reliablitity*
