Quote Originally Posted by BSmith View Post
If it's not it would produce iron only when players are near? What is the production rate? May not be that much of a problem if the rate is high for it to be off by itself.
I glanced at the video, and it has to be in the spawn chunk in order for the villages to not merge, due to the way chunks are loaded when players are in the nether and the like.

There seems to be a lot of spare space underneath the farm, so it could always be enclosed, beautified slightly, and turned into the city's industrial sector (for other automatic farms). Just a thought.