Well, they finish off the clip with a reference to the World Premiere date so I expect it is real. I have heard that they are definitely keeping the fundamental ability to fold the seats to create a flat cargo area. This is a significant differentiator for the LR4 when compared to any other vehicle in its class if not any other vehicle period. I am glad they are carrying over that flat cargo area. One of the complaints against the LR4, though, was that many found it difficult or awkward to stow/deploy those seats. Apparently this is their answer - make it push button. But does that mean one would need to wear a huge wrist band with all the controls to manage the vehicle? ;-) I also wonder how long it will take, or how much off road jostling, to mess up those motors.
And, yes, this is certainly the real thing. Absolutely no reason to hide it this close to the World Premiere. I wouldn't be surprised if there will be other clips released that highlight other areas.
I also find the link to Bear Gryllis and the sky diving team. They are clearly trying to appeal to the adventure audience rather than the mall crawler. I'll bet they are worried about losing the "adventure" image/audience. So I would expect more marketing that tries to associate the Discovery with "adventure" and outdoors activities of some sort.
Finally, below the YouTube version of this video you will find the following link to the page on the LR website for the new Discovery. Not much there yet but you can register to be notified of updates.
http://bit.ly/2bQixZB