The sound card on my computer isn't exactly functioining (joining my ipod, digital camera, and anything electrical that possibly could break in my house...NOT been a good few weeks), so I'm not sure of the signifiance of the whole start of the video (from the dog to the posters...).
Springing the cards from hand to hand needs work. Lots.
Now, the reason you posted:
The Jones Change:
I wouldn't think anything is "exposure" considering there's a free tutorial up, so I'll just say what I think. Practice getting a double lift. You could see on camera you grabbing two cards and lining them up (well, almost...then you went out of camera shot for a second). Part of the Jones Change that's important is the smoothness of it. It should look very fluid as you pick up "a" card from the deck, casually display it, and then change it.
The good news is, that's the EASY part of the change. Unless you're really new with cards, you should be able to incorporate a faster double lift fairly quickly. Once the double was in your hand, everything looked decent...and considering the change itself is the harder part of it (for myself anyway), you should be able to get this down near-perfect in no time. Just work on fluidity.