The agency TBWA has a separate building dedicated to Apple ads that even regular Chiat employees can’t get into. The Media Arts Lab has three Final Cut edit bays, Pro Tools HD surround studio and a machine room with the Apple Xsan fiber network at the hub. The creative staff that works on the project has never been connected to any leaked info, and access to the building is probably manned by a guard, 24/7. Only those creative directors, production people, and a handful of janitors know what’s going on in there for sure.”]
Source: https://gizmodo.com/the-secretive-apple-ad-factory-chiat-days-high-securit-219187