ok, so since i've bought apple tv i've started buying more and more movies and tv programmes from itunes. How though, if I buy a movie through itunes on my imac, can i then access it or download it to my macbook air so i have it on both devices? I have seen that through icloud that you can manually download previous music purchases on all devices but it doesn't seem to give me the option for video.. any suggestions? as I would like all my videos on my imac for home use and my air for travelling. cheers.