Winning at video poker is possible by learning the optimal strategy, selecting a game that is above 100% return including cashback from the player's club, and being sufficiently bankrolled and disciplined to reach the long run.
Almost all video poker opportunities require the addition of cash back from the player's club to be positive. Even then, it's a tough game. It is psychologically much tougher than blackjack, because most of your sessions are losers, even when you are playing a winning game overall. It's basically lose, lose, lose, lose, win a little, lose, lose, lose, hit a royal to get positive again.
Very tough on the psyche. However, comps are a lot easier with video poker, and with a few exceptions, players aren't generally backed off by the casino while playing video poker. (yet)