The game of Video Poker was made possible by of the invention of the computer chip, thus its origins can be traced back to the mid 1970's. The actual term 'Video Poker' is used to refer to the many variations of the original Poker game.
Video Poker is a combination of Slot Machines and the normal 5-card draw Poker game. The obvious differences are that Video Poker is played against a machine apposed to humans. The primary goals are still the same; to achieve the certain hands indicated on the payout table for the particular game you are playing. Each game may have unique rules and payoffs, but all are played in a comparable manner based on the original poker game.