Most simple question you'll ever read on this forum... My folks have just asked me to buy them an Apple TV for Xmas. They want it to play their video library, which is mostly in .avi form. I know nothing about Apple TV and they know nothing about anything related to computers/electronics. If I buy and set this up for them, are they going to be able to run it with very little ease? For example, can Apple TV automatically play .avi files, or does that need to be converted to run through iTunes?