I have to agree this is an absoluetly great little trick and very good value for money. I didn't like it much at first as I thought it a bit cheap looking, but in fact for the reactions alone it is really a little gem.
I haven't actually seen the video clip (as I can't view rm files from work), but the way I do it is to show the card, put it back in the card case, put the card case in the black box and cover up the box with a hankerchief/cloth.
I then ask if they would be impressed if I made the card that they saw disappear from the deck.
I then tell them to remove the cloth, and to see if the card is still there. When they see that in fact not just the card, but the whole deck has disappeared

- well it gets quite a reaction.
and so cheap.
Yankeetom - this is one you will like a lot, a really easy, and really 100% selfworking card trick with a twist. Mind you, it doesn't have any brass in it

(hhhmmmm, now there's an idea

)