The role of libraries are rapidly shifting, in large part as a consequence of digitization. In addition toproviding access to collections of books and other physical media, public libraries today are embracinga new role of becoming urban hubs, in which a wide range of activities take place. In these activities,local knowledge is developed, exchanged, and disseminated. However, there are still very few digitalservices that support this new role. Here, we explore how to develop digital services for supportingand leveraging user-generated video content in library activities. Based on interviews and designscenarios as probes, we describe the potentials and challenges for designing such services, as seenfrom the perspective of library staff. Our insights will inform the design of a new digital service forpublics to participate in collaborative production of videos to document, exchange, and disseminatelocal knowledge generated in library activities.