Civilization V Gameplay Video
Still confused about Civilization V's many changes from previous games in the series? This video walkthrough should answer any remaining questions.
As dry as Firaxis' Peter Murray's voice can be, this live gameplay demonstration does a good job of explaining the basic concepts of Civilization V (and to be fair, he gets a little more animated once the nukes come out). There's not a lot of new information, but seeing it illustrated in video form might make it a little more clear. Just about every major part of Civ V is covered here: social policies, research, city production, and the ins and outs of the new combat model are all dealt with.
Looking for more Civ V details? Check out our extensive interviews with the lead designer and art director, hands-on reports for both single- and multiplayer, or an in-depth look at the game's city-states.