iTunes is a proprietary digital media player application, used for playing and organizing digital music and video files.

iPad is a line of tablet computers designed, developed and marketed by Apple Inc, primarily as a platform for audio-visual media including books, periodicals, movies, music, games, and web content

iPhone is a line of Internet- and multimedia-enabled smartphones designed and marketed by Apple, including iPhone, iPhone 3G, iPhone 3G3, iPhone 4 and iPhone 5

Here are some of my tips for getting more out of iMovie, including: iMovie Video Conversion, video to iMovie conversion and iMovie video editing tips