i'm no programmer, but to me that seems to be a quite easy thing to implement with a patch after release. just let the game grow on community and it'll come.
I think videos are the base for a large community. I mean, there are billions of Modern Warfare videos on Youtube and these are a very important factor in community-building. As for example in one commentary the guy said every time he would watch a MW2 video he comes back to play MW2, even though the game frustrates him so much (which it is designed for, he says).
I could really see a RvB series in brink I mean it wouldn't be hard to make new a creative characters for it quickly.... as long as you can remove the hud and guns.
RvS rather, no?