How were you getting the patterns where circular slices were cut out of parts of it? Was that a trick with the camera framerate, or just jumping to the next segment early? (For instance, that transition bit at 0:14-0:17)
Yep, it's to do with the camera frame rate, or rather the shutter speed. It wasn't actually intentional but just a byproduct of changing the speed at which you draw the image. You could replicate it by jumping to the next segment early though, as you've suggested :)
