The University of Michigan also has an excellent guide on securing permissions for copyrighted resources--including for films, book chapters, music, fine art, photos, and more.
If your particular FAQ isn't addressed here, there's a good chance that U.S. Copyright Office's Compendium has something to say about whether that type of resource is copyrightable, and the level of protection it receives.
Compendium of U.S. Copyright Office Practices, Third Edition (2014)