We found that your app only provides a very limited set of features. It only feature a stream of a TV channel. While we value simplicity, we consider simplicity to be uncomplicated - not limited in features and functionality.
We understand that there are no hard and fast rules to define useful, but Apple and Apple customers expect apps to provide a really great user experience. Apps should provide valuable utility, draw people in by offering compelling capabilities or content, or enable people to do something they couldn't do before or in a way they couldn't do it before.
We encourage you to review your app concept and evaluate whether you can incorporate additional content and features to provide a more robust user experience. For information on the basics of creating great apps, watch the video "The Ingredients of Great Apps".