Well... all of them I'm aware of still require human input. Clever software can determine what kind of file it likely is, dimensions of an image and other parameters of the data ... but it can't know that X.jpeg is a picture of a butterfly and Z.avi is a video clip of a biker bear pissing on a club prospect unless the item has been properly keyword tagged.

If the system is good, it will require a login (or interface with an existing login system) so anyone who does NOT tag items they submit into the system can be beaten about the head and shoulders (or whatever) until they do so.