The trailer posted in the video section is, as named, the 2nd trailer. I've lost the first one I made, but it does exist on youtube. It's not great, has some weird aspect ratio issues and, like the 2nd, shows off the poorly proportioned road textures - now fixed... Anyway, here goes:
What it does nicely show are the molotov cocktails, exploding barrels and "the gate" being triggered, then firing and monsters appearing.