Being a video poker croupier is seriously hard work. If you don't believe me just go talk to one and start asking them questions while playing in front of them. Ask them what hands you should hold and why, ask them about the odds and payout percentages.
If you don't know then croupiers for their game specialities have to know the game inside out. It truly takes a lot of skill and brain power to cram all of this video poker knowledge into your head. Sometimes they are really bored at their job so go and talk to them.
Learn to play jacks or better video poker with these guys as they will give you the full set of strategy tips. It is the best way to learn to play plus you'll get free drinks on top of it.