For a start, headbobbing, panting running. Is this going to be in, do we think? Personally I would love it, but it looks far too... perfect to be gameplay.
Headbobbing doesn't seem like it would be to hard to have in, so I think it's real. It also was in Daggerfall and Arena, so I don't doubt it.
Secondly, hands visible in first person. The bit where he stops at the cliff- thats some nifty edge detection right there, and a good animation too. Or an exadurated piece of CGI.
You can always see your hands, and I think they did a really good job on it, so I think it's real.
The cliff detection I think is fake. If it is real, then people will complain that they wanted to jump off a cliff and weren't allowed to. It would also be hard to get the slidding-amount, lean-back-amount, and all of the other things correct with the speed. I think it would be better if they just let us jump off cliffs.
Thirdly the animations of dragon fighting. I know the burning of the ground is confimed but Come on, unless bethesda really is that awsome, that can't be what dragon fighting is going to look like.
I think that the finally of the dragon slaying is a cutscene. I think you will fight the dragon but when there is no health left (for the dragon), it will bring you to an automatic finishing move cutscene (which depends on the weapon you use and where you are).
All of this is speculation, so I, quite frankly, have no clue on what it really is. I may be right, but I may be totally wrong.