I have fallen in love with the ATV's new "aerial" screensavers and wanted to find something similar. However, everything I could find only used still images. So I signed up to become a developer but after looking around for a bit, I still don't see a way to use a video stream inside a screensaver.
Is it possible to have a handful of 5 minute videos loop in a screensaver? If not, are there any real reasons why it's not allowed?