Okay, from what I've seen, the reason that this wasn't done the other 10 or so times that I've seen it suggested was that players simply do not turn like that. In order for you to actually have this effect (without awkwardly crawling on the wall) is to create a new model for your player that is sideways and upside down. That's only two models, but actually having the models change to match your player (we don't want you to change to standard bot when you rotate) seems like it would be difficult. Of course, this prevents the possibility of having you gradually shift to sideways as the video does, as that would require a significantly larger number of models. There is, on the other hand, the possibility of using a tumble-player thingy to turn them like that, but that seems like it would be rather glitchy, as the tumble itself isn't that great. So, basically, I think it's possible, but it would be difficult.
tl;dr: It's going to very difficult to do.