Scholarly sources aka academic scholarship tends to come from people (like your professors) producing knowledge within the university system, and is written primarily for an academic community, or others in the field who are engaging in ongoing scholarly conversation:
All of the films for this course will either be in Swank Digital Campus or Kanopy. If you do not see the film you need, contact your librarian.
Search for journal articles on most topics. This multi-disciplinary database is a good place to start if you don't know where else to begin. (EBSCO)