Visual sociology aims to study the visual products (advertisements, art, news footage, film, etc.) produced by a culture or group. In essence, it is image-based sociology. For example, scholars have analyzed this cover of Vogue:
Leibovitz, A. (2008). Cover Photo. On Vogue, April 2008. New York: Condé Nast Publications.
They have explored how such an image reproduces the racial and gender themes of this earlier image:
King Kong. (1933). Film Poster. Retrieved from http://thesocietypages.org/socimages/2008/03/14/athletes-and-models/
For more on these images, see Race and the King Kong Motif (Sharp, 2008)
If you use an image or video clip/still in your work, you will need to cite it. Citation requirements may vary by the style guide you are using. Check out the "Citing & Writing" page in this guide for more on citation.