Hmmm, i could barely see what was going on because it was so dark. It looked just like some shuffle control with an erdnase change at the end. I could be very wrong though.
Hi, I´m a card-magician and you did a nice and clever change ... just the "glide" (I hope using this word doesn´t reveal too much) is a little too obvious, I think ... anyway - very good trick - keep up the good work.
What I would do for the change is show the card face up and make the change so the new card appears face up on the old face up card. If you don't understand, P.M. me. I'm trying to avoid revealing anything.