I watched all 5 videos last night. It was very interesting
I think the videos show well how the games mechanics change your game play.
They start off as a large co-op group - all bravado and running everywhere picking off the zombies as they come. So brave they run headlong into the first swarm and the bravado is replaced by squeels.
As their ammo depletes the seriousness comes in and the game changes to one of foraging. Their numbers decrease and as that happnes you see them changing again. running for their lives, getting split up, leaving the hapless behind (especially if that one person is being chased by 5 or more zombies).
Game then moves from foraging to survival as all but the last few rounds are gone and they are forced to find more but only finding zombies along the way. as the last few baracade themselves in a tower, they have no way to escape, only food and water.
Then it changes again as they are rescued by a former team mate who stumbles into the same area (i think it was an ingame 40 minute wait) and clears out the zombies beneath them. they join up, and discuss that the other group they were with are now hunting humans for food and ammo. you can see the distrust building and their play style changing to meet the need.
They are back to foraging but this time realising that stealth works very well and you can get quite close to zombies if you are quiet. then they start encountering more players. Previously they were happy to yell out to other players and introduce, now introductions are down behind the barrel of a gun, cautiosly with back up in a flanking position.
You can see meeting others is very risky indeed even to the point the group in the video stalk another group for quite some time to ensure a postive encouter (either by force or peace)
Looks like a marvelous game, and makes me wich i had Arma 2!!!
I enjoyed the videos so much, i am wanting more. !!