Cards Re-unite After Being Separated

Card tricks can, I believe, become rather boring. So I like to present videos that get away from the "Choose a card - Lose a card - Find a card" category. I think you'll find this one a little more interesting.
Sixteen cards are dealt into four piles of four. Each pile contains one court card and three 'pip' cards.
ne by one, the piles are examined, to find that the court card in each of the first three piles have disappeared, and have been replaced by a pip card. On examining the remaining fourth pile, it is seen that it contains all four court cards.