I'm looking for a short zombie movie I found awhile ago?

I stumbled across a short film, kind of a 'mockumentary', about zombies awhile ago. I believe it had footage in it from Night of the Living Dead, or possibly Dawn of the Dead, and a man with a British accent narrating. It wasn't the typical zombie film, it was done more like an informational film about an animal species. It was highly entertaining, and I can't remember where I found it! I've searched high and low on the internet for it, but no luck. I'm hoping one of you will know what I'm talking about, and make my day :D So, anyone know what/where it is? ^_^