I'm trying to watch a show I just bought on iTunes on my apple tv 4. However its taking like 30 minutes to load enough for me to play, and then it plays faster than it loads and ends up buffering before long. I don't understand why downloading from iTunes is so much slower than streaming from netflix or HBO. All the data still has to make it to my computer right? I don't get why iTunes isn't capable of letting me watch right away. Can anyone explain?