There are several different ways to develop a video poker playing strategy. It could be tailored to favor hitting royal flushes. A strategy developed in this way could be useful in video poker tournaments where the participant has a limited amount of time to get a high score in order to win. This type of strategy would see a greater number of royal flushes. It would however also see a smaller return to the player because smaller winning hands would be sacrificed in favor of holding for a royal flush.
A straight is a hand with consecutive ranks, like 9? 7? 10? 8? 6?.  Notice again that the cards don't have to appear in order.  The order of face cards, from lowest to highest, is Jack, Queen, King, Ace, which we abbreviate J, Q, K, A.  An ace can also count as 1, to complete a straight where the other cards are 2, 3, 4, and 5.  But it can't count as both a low and a high card, e.g., Q K A 2 3.