^^I disagree. Her technique is consistent and supports that kind of speed. I'm an amateur pianist and that sounds exactly like a piano being played in real time, and it is obvious she is covering all the notes in real time. I've seen pianists move much more jerkily than that as well. Stuff like this is within the realm of possibility with enough practice, just ask Liszt!
This is a Rachmaninoff etude, if I'm not mistaken, and one I can't play (yet)
Great technique; technically very good, though I personally don't like it at that tempo.
EDIT: Valentina Lisitsa, eh? Hadn't heard of her, but I think I am now a fan.