User-contributed content plays an increasingly important role in the Internet's evolution, overtaking professionally created and curated resources. Many social, legal, and technological forces shape our perceptions of who can do what with Internet content. In this article, we take a bottom-up view of content ownership and control, seeking to identify the norms and practices of everyday media users. In this video, author Catherine Marshall discusses "Who Owns the Social Web?" (cacm.acm.org/magazines/2017/5/216329), a Contributed Article in the May 2017 CACM.