Mocap from previously shot and/or existing 2D video? <=Originally posted in wrong section

I am very interested in this tech as I have been waiting for it for many years and all I got to go on is a one-second tease from the Omniverse introduction video… So my question is this; does it exist and if so, how do I access it, and will it transfer over to BVH files?

Any info would be appreciated; thanks in advance!