materials

A downloadable piece of content (for example, a lecture) you add to your courses as media files (audio, video, web, app, book, document, and so on). You can add materials using files on your computer, web links, or existing iTunes Store, Apple Books, and App Store links. Use URLs to reference your materials when possible. Apple recommends providing original materials used in lectures (for example, slides, videos, photographs, and so on) as separate downloadable materials and organizing materials on your Mac or PC in a file folder so you can easily add the files to iTunes U.