You know there is given the title of this article and video you most likely skipped to before reading the text. There was about two and a half minutes more footage that was not seen in the first clip. Some of which can be "tied" to how the heartless were created in Kingdom Hearts, but that is just some fun extrapolation from the clip.
In the end though, it does look like Epic Mickey is going to have quite an interesting start to the game. If it can actually manage to keep it going throughout the whole game, there could be a reason to dust off my Wii again. Totally can't wait.