The whole point of Planetside 2 is that it's a big shooter. Even by Battlefield or ArmA II standards, it's enormous. Big maps, even bigger battles. To give you an idea of just how big, take a look at this amazing video.
This is apparently 100% "organic", in that none of the actions were staged or manipulated in any way. It's just one of the game's big battles shot rather nicely, then uploaded so we can all enjoy.
We (and you!) had an interview with Planetside 2's senior art director Tramell Isaac and creative director Matt Higby earlier today, which you can check out here.