It's not a Hasselblad, it's a Leaf AFi with a Leaf Aptus back. It's not the new Leaf AFi 10, which has a rotating back - he wouldn't neeed to turn it on it's side to get the shot.
...btw, all these cameras (incl the Hassy) come with interchangable viewfinders, so don't let it throw you that the official product shot uses a different one than the photographer in that video.