iMovie Sync your movies to your iPod, iPhone, or iPad
If you want to sync and view one of your iMovie projects on your iPod, iPhone, or iPad, you first need to send the project to iTunes. When you do so, iMovie allows you to create one or more movies of different sizes, depending on the size of the original media in your project. The medium-size movie is best for viewing on a range of iPod or iPhone devices, or on iPad, but you may want to choose a larger compatible size for improved video quality.