This is a routine Roger Klause and Allan Ackerman worked out in the 70s. The effect is the classic find the black lady. The classic effect is to throw three cards on the table face-down. Here the cards are simply displayed and counted to the table to achieve the same basic effect: the spectator never finds the black lady. The three card monte is expanded to a four card monte and the climax is that the cards change to the four aces.
runtime: 9min 36s