First off, don't make a move out of it. It isn't EVER going to be performed that way. The only way to learn the pass is to perform it. You don't need an invisible one (because in the real world, you will never have an invisible pass), you just need to work on your misdirection. The pass is never going to be done while someone is watching your hands.
Next, relax a bit. Your hands are too tense.
Film it at a real angle, not an angle from directly above.
You don't need to go fast. Making it go fast is just going to make it look jerky.
Make your motions more natural. It shouldn't be an instant slapping on to the deck, but more like a casual hold on it as you would go and square up the deck.
Take the deck out of the frame when you do it. So if the card is put into the deck at chest level, make eye contact and talk as you drop your hands to your sides, bring the deck up eventually, do the move, drop it again.
And as these guys have said, check out Jason England's Session on the Pass, as well as the work in The Expert at the Card Table, the Royal Road, et al.