Here’s what Apple told him:
Thank you for submitting your application to the App Store. Unfortunately, your application, Trailers ~ movie previews on the go, cannot be added to the App Store because it violates section 3.3.10 of the iPhone Developer Program License Agreement:
“Applications may not perform any functions or link to any content or use any robot, spider, site search or other retrieval application or device to scrape, retrieve or index services provided by Apple or its licensors, or to collect, disseminate or use information about users for any unauthorized purpose. “
There is no public API the iTunes Movie Trailers to be used in the manner demonstrated by your application.
App Review Team
Apple provides an RSS feed of the movie trailers, which certainly can be considered a public API. That feed is publicly available and anyone can read or subscribe to it. There’s absolutely no reason an iPhone app shouldn’t be allowed to access it.