This anthology offers the first systematic exploration of 9.5mm amateur film culture, practice and consumption, from its launch in 1922 to the present day. It breathes new life into our understanding of participatory media and its origins in the early twentieth century, revealing how a web of experiences gave rise to a vibrant ecosystem of collaborative storytelling and grassroots cultural movements that continue to shape our understanding of media participation. The collection brings together the work of emerging specialists, early-career researchers, and respected scholars from anthropology, film, media studies and international film archival networks. The 16 chapters in this volume offer fresh insights into early participatory media culture and confirm the ongoing influence and impact of 9.5mm film on global media studies. The interdisciplinary approach and wide-reaching perspectives make it a valuable resource for cinema and media curricula, film archival projects, cultural and media anthropology, visual sociology, as well as gender, memory and migration studies.