The denomination of a video poker game is the amount of money that is counted as one credit. Game denominations can run from as little as one cent up to $100 or more. That is quite a range! Obviously the denomination of the game you play will impact you bankroll requirements. In most cases the impact of the game’s denomination on your bankroll is fairly straight forward. In other cases, not so much. Let’s take a look.

Two important points to remember: Don't overbet your bankroll, and if a machine is available at which you feel comfortable playing the maximum number of coins, do so. If you are sitting down to play with $20, you don't belong at a $1 machine that will take up to $5 at a time. It is better to play five quarters at a time than one dollar at a time. Though video poker machines pay back a high percentage of the money put into them, the payouts are volatile. It is not unusual to go five or ten or more consecutive hands with no payout. Don't play at a level at which you do not have the funds to ride out a streak.
10. Low pair (two 10s or lower). Most new players keep a single jack or better rather than a low pair, and it's true that keeping that one high card will result in more frequent winning hands. But most of those will be 1-for-1 payoffs for a pair of jacks or better. Keeping the low pair will result in more two-pair, three-of-a-kind, full-house, even four-of-a-kind hands.
Paytable: This is the table on the poker screen that shows you how much each hand in a poker game is worth. As previously stated, you'll want to choose a table that has the best paytable, meaning the highest payout for a win. Each paytable will show you how many coins you'll get in return for winning a hand from one coin played to up to five coins played.
You can usually gamble your winnings when you hit a successful hand at video poker. If you do decide to gamble, you’ll be presented with a card, and you have to guess whether the next card drawn will be higher or lower. If you pick right, your prize is doubled. If you choose unwisely, then you lose everything. Depending on the game, you should be able to go ‘double or quits’ up to five times in succession.
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.