Standard video poker machines are called single-play because the player plays only one game at a time. However, single-play games are not the only type of video poker game available in a casino (or online). There are also games that play three, five, 10, 50 and even 100 hands at a time.
These multiple hand games are called multiple-hand or multiple-play (or multi-hand / multi-play for short). There is nothing magical about how to play video poker multiple hand games.