Watch it and you will see what the man with the video camera calls "...the secret". Watch it closely and you will see the gamer pushing a button on the top center of the remote; and it looks like this button releases whatever is attached to the remote. So, what could attach to the VC controller?
It has been confirmed that when you are using the classic controller you can clip it to the back of the wiimote so it doesn't dangle in the air.