Interested in discovering what films you can get your hands on at Princeton? Consult this guide to find films using the library catalog. If PUL doesn't own a film, suggest a purchase or write to me directly.
Princeton also subscribes to a handful of video streaming resources: do a search for video at the DATABASES search.
If interested in finding or using data, consult the Data & Statistical Sources website, a unit in Firestone Library that provides specialized services. Refer to the University guidelines on using and posting to SM; see especially the Glossary at the bottom. See this list of SM Research Tools.
The Chicago Manual of Style does a good job of providing examples of citing different kinds of social media platforms.
The online version of MLA provides guidance in a few different sections:
Citing social media using APA - consult this guide.
Types of social media (be strategic in what you choose to work on/with, not random):