A storyboard to show the basic outline of the animation.
Paired with this is the Concept Video showing a more detailed explanation of the animation:
I call this a concept video as it doesn't quite fit being called a previs. It's more showing the concept behind, because the the animation itself is not refined enough (such as camera movements).
This is not a Pre-Vis. It does not represent the final timing, framing or animation of the final piece.