For the past few months, a lone drone operator named Duncan Sinfield has been furtively filming construction at Apple's new campus in Cupertino, CA. It's a massive project. When the circular building is completed, it's going to look a lot like a spaceship. Right now, it looks like a half-finished one. Shot early this year, Sinfield's latest aerial video shows roof segments being lifted into place and the installation of some massive windows.