This game has been on my radar since it was first unveiled. This footage shows a bit less action and more puzzle/exploration segments. There's still no footage of any creatures or infected humans or anything of the sort; it is still just footage of regular ol humans. However, something called 'clickers' are mentioned by one of the guys scavenging the building.
One thing that bugged me about this footage was that, out of context, I don't get why he decided to just attack the first two guys. They weren't doing anything except scavenging around, and from the sounds of them talking, they were a little worried and uneasy. Joel just attacks one of them without knowing for sure they were hostile or not. Its make me think he is overly protective or that he did something to piss off a huge group of guys, causing them to go out and look for Joel and Ellie. Again though, this is a bit out of context as we don't know what happened before this video starts.
Also, I hope there is a lot of exploration. I'd like the game to let up on the action for a good chunk of time to just let you take in the sights and scavenge around, letting you put your guard down or even rack up the tension because you just know something is going to happen but you have no idea when because its just staying quiet and calm.