This paper explores the intersection between sustainability and social media activity by studying how user-generated content (UGC) creation enacted and communicated social sustainability in times of restricted social interaction. The context is Wuhan in China, a city that implemented a 76-day lockdown in the early stages of the COVID-19 pandemic. Based on a sample of 187 short videos created and posted by Wuhan residents on Douyin (TikTok) during the lockdown, this paper answers this question - how did UGC creators produce short videos on social media to facilitate social connections with others? UGC creators' video-making practices are conceptualised in the typology of Evoking, Performing, Collaborating, and Narrating, and each practice enabled creators to connect and socialise virtually with others, thus contributing to all participants' social sustainability in a pandemic. This study contributes to media management scholarship by adding knowledge to the understanding of two areas: the productive role of media audiences, especially their content production practices and logics; the nature of short videos as media products.