Yes and no. If you are showing a movie as part of your in person course, you can usually show the whole movie without worrying about copyright clearance. If you are using a film in your online course, the most common interpretation of copyright is that you can use the minimum necessary to support your learning objectives (for example, making a clip of a scene rather than showing the whole movie). If you need to screen a whole movie in an online course, you probably want to check with your subject librarian to see what kinds of restrictions the film is under.
If you are showing a film on campus as part of a club, movie series, or special event, you will need to have public performance rights. The library has a few streaming services that often include public performance rights, like
Academic Video Online and
Kanopy. Once you have identified a title you'd like to show, your subject librarian can check to see if our subscription includes public performance rights or if this is something that you would need to purchase.