Blackjack Dealer-to-Player Single-Card Switch
This switch involves one or more signals from the player, and a sleigh-of-hand maneuver by the dealer. The purpose of this switch is to cheat the casino by making the player win.
For demo purposes only one active hand was dealt, and the switch was made right after the deal. In a game, however, this switch would be performed with a different timing. Below is a description of this switch, as would be done during an active game.
The player is seated to the dealer's right, at a position to allow him to play last, after all the other players. The player places a $200 bet (two black chips). He is dealt two cards and receives, in this case, a total of 16 (10S, 6C). Now the player needs to signal to the dealer that he has a bad hand that consists of a 10-value card and an odd one. This signal is not shown on this video, but it is easily accomplished by laying both cards down, to rest, in a predetermined position to signal that the hand contains one 10-card.
At this point the cheats have a very good chance to catch a 20, or a 21, because of the presence of the 10-card. A desired card will be secured while other players ask for hit cards. The cheats have four possibilities for a favorable outcome:
The video shows the 4th scenario. There are several methods for securing a desired card. One option involves flashing, i.e. the dealer flashes the top card of the deck to the player each time after dealing a hit-card. The player only has to signal to the dealer when one of the desired cards shows up at the top of the deck, and from then on the dealer will deal seconds every time any of the players asks for a hit. The odds of catching a desired card are great, because in this case the desired card could be a 4, 5, 10, J, Q, K, or Ace. If the cheats secure a 10-card or and Ace, the player will signal to the dealer that he requires a switch. The signal in this video is done by the player switching his cards before he lay them down. In this case the player wanted to collect on a natural (because an Ace was secured), so he tossed the cards forward after signaling for a switch. Then the dealer turned the player's hand over, and in doing so switched the 6 for the Ace.
If a 10-card was secured, then the player would have signaled for a switch and tucked both cards under the bet, as if he wishes to stand. In this case the dealer would have to play out his hand first and later switch the player's 6 for a 10, only if necessary (i.e. if the dealer didn't bust).
Apart from the dealer turning over the payer's cards in a suspicious manner, there is yet another giveaway that something odd is happening. In a real game, the player would show his natural (Ace and 10) right after the deal, and before other players start asking for hits, and the dealer would settle the natural first. In this case the player "showed" his natural at the end of the round. In addition, the player tossed his two cards face down. Usually, a player would toss a natural face up.
This strategy has no practical use in a regulated casino. First, the dealer is not allowed to hold the deck in mechanic's grip, and the the dealer would probably not be allowed to turn over the player's natural with the hand that is holding the deck. However, the cheating strategy would probably pass in any home game, or a game run in an illegal after hours club where no one really knows what goes on. Additionally, the strategy can work really well for a demo.