Nice work. A couple of points I noticed that you might find useful.
First, as the dirty hand comes away from the deck, there's a very definite change of pace, and loss of fluency. To my mind, the DPS should be performed as one fluid movement, or maybe as one fluid movement, a pause, then a second fluid movement.
The other point is that you chose to leave the hand palming the card in frame. I know it was just a demo video, but, to me, that indicates that you're putting too much focus on that hand. The spectator should just see a card being squared into the deck, followed by a justified action such as handing the deck out to be shuffled. In other words, the dirty hand should, apparently, perform not other action other than steadying the deck for the other hand to do the squaring and handing out, and, therefore, be intantly forgotten.
I hope that's useful!