The pace could be taken down a notch or two. A blur of great magic is still a blur.
At the very beginning, the first card is turned over using all your fingers; the remaining ones with the thumb and index finger only. Is there a way to get all the actions looking similar?
About 0:06, there was the double-clutch on the second card, but hey, these things happen.
Around 0:10 - 0:11, the right hand looks a little awkward reaching across to cover the coin.
Around 0:15, the right hand is using the thumb and index finger to adjust the cards, the left hand uses all the fingers - try to have the hands mirror each other. Maybe use the index finger and thumb of the left hand as well as the right. It's this kind of thing that might lead someone to think that you're holding out. If the hands look the same, it takes some of the heat off of them.
I realize that this isn't a real performance - no patter, we can't see you at all, no spectators, etc. And some of this may seem kind of nit-picky, and that most people won't pick up on this, but it will take just a little more polish to get it past even the sharpest ones in the room. Details make for perfection, but perfection is not detail.