It seems like Lattner's part of the show is gone from that video now, though it had been there yesterday when I clicked the above link (or maybe I'm just doin' it wrong now?). Anyway, looks like Lattner's part is here now: https://www.youtube.com/watch?v=Yze693W4MaU.
Also see Chris's introductory post for the project: https://groups.google.com/a/tensorflow.org/forum/#!topic/swi...