Want to take your own photos? The library has DSLR cameras and a 360 degree camera available for you to borrow for free.
If you want to use photos others have created, there are free and legal ways to do it. Explore the Creative Commons resources on the Finding Media to Use page.
If you are planning to put your project up on Facebook or YouTube, it's a good idea to get your subjects/actors to sign a release. This is a good, basic one to start with.