Your paper should use a mix of secondary and primary sources. Both types of sources serve distinct purposes in academic research.
For academic research, you should rely mainly on scholarly books and journal articles, since they are peer reviewed. That is, they are reviewed by fellow experts in the field to ensure that the research and argumentation meets minimum standards for publication.
Have a direct connection to the creative works, people, or events that you are studying. Within film and media studies, some examples include:
Primary sources are what you use to answer your research questions. Going back to them directly rather than simply relying on the perspectives of other scholars will help you develop your own insights.
In order to use primary sources effectively, you should develop a solid understanding of the cultural and historical context surrounding your topic by becoming familiar with the secondary literature as well.