This lecture explores the integration of audiovisual resources in the Lausanne Time Machine project, focusing on the history of the Cinéac cinema (1938-1969). It discusses the significance of audiovisual materials in urban history, the evolution of the Cinéac cinema, and its impact on Lausanne's cultural heritage. The presentation also delves into the post-Cinéac era, highlighting the preservation efforts and the establishment of film archives. Through case studies and historical documents, the lecture sheds light on the urban development of Lausanne and the socio-cultural transformations captured in the audiovisual records.