My first impression after watching your preview is "Powerpoint which can take in screencast and live video." Not entirely if this is what it does, but is the closest thin in my mind.

The major difference from just recording via a tool like Loom or Soapbox is that video sits on top of Slides, and can be played back every time one moves up/down the slides.

Basically, unlike a typical screencast, this one has chapters, so you can give a presentation without physically being in the room. Interesting.