Live-action juggling tutorials have a filming problem: the part a learner needs to see — where the throw peaks, when the hands swap, which ball is occluded at the moment of the catch — is the part the camera cannot hold still. Juggling X-Ray builds the same tutorials as 3D animation instead, so the timing and the hand paths can be drawn explicitly and replayed from any angle.
It is a Blender and Python production system rather than a set of hand-made videos: patterns are described as data, and the renders, narration and validation are generated from that description.