Liked the trick, liked the music too, however if possible I would show the cards at the end differently so that it shows the right amount of colours, if you understand what I mean.
When I use that particular count, I make sure that the audience sees the right number of colours (i.e. two red, two black), so just make sure the card that's on top, i.e. the one you show first, has a different colour to the other two.
I don't think a spec would notice to be honest (either in my video or in performance). I've never been too bothered, but for the little extra effort that is required to put into setup, it is probably worth it.
Very good!
It was a bit hard to make out whether some cards were kings or queens due to the resolution, so maybe you could have zoomed the cam in a touch.