Actually, watching that cube move for a while shows actually how simple it is.
If by that you mean rapes your mind from behind then yes, yes it does.
Not really, the cube just turns itself inside out, the inner cube stretching its top out to become the top of the outer cube, then the top of the outer cube going around and becoming the bottom, and the bottom going inside to create the bottom of the small cube. All it is is just a bunch of moving parts.
Just a cycle. The only think that makes it complicated is the amount of moving parts, in fact it'd probably be easier to see if it wasnt always rotating.
Inside goes out top, outside top goes around to bottom, bottom goes inside.
