In the first video the humans complete the red queen map, which I've never seen done before. The map is really tough to beat because you have noobs who die which creates more zombies.
Second one is where we were chasing the last survivor, but he ends up killing me and winning.
Sorry there's no sound, this was recorded before I had figured out the right sound recorder option.
Red Queen Map: http://www.xfire.com/video/77b9e/
Zombie Chase: http://www.xfire.com/video/77bd8/