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.
As you have learned in the first chapter, one of the main reasons for the popularity of video poker is it usually has a considerably higher payback than slot machines. In fact some games return more than 100 percent for a skilled player. Regardless of which video poker game you play, achieving the long term return percentage is dependent on getting your fair share of royal flushes. By a royal flush I mean the royal flush that really counts – the natural royal flush that is formed without the aid of a wild card. These generally pay 4,000 credits for a five-credit bet or 800 for 1.

Right after learning the proper strategy, the most important thing about playing video poker is to choose a machine with a good paytable!  Here are some pictures I just took in the same casino, same style game, same denomination.  The only thing that's different is the paytables.  The first one pays 9 & 6 for the full house and flush respectively, and the second one pays only 8 & 5 for those hands.
Video poker is a very volatile game, about four times as much as blackjack. In any form of gambling, short-term results mostly depend on normal mathematical randomness (what some might call luck). However, in the long run, results mostly depend on skill. If you play a game with a return of 100.76% perfectly, that does not mean that you will have a 0.76% profit every time you play. The 100.76% is an EXPECTED return. Much in the same way, if you flip a coin ten million times, the expected number of tails will be five million, but it is unlikely you will hit five million on the nose. Actual results will vary significantly from expectations, but the more you play, the closer your actual return percentage will get to the expected return.