Plusieurs séquences (Multiple sequences)

Ironically, in traditional video editing terminology, a “sequence” refers to a multitrack timeline even though there are things happening in parallel and a playlist more resembles a strict sequence. Shotcut does not directly support multiple editable sequences in the same project, but see File > Open MLT XML as Clip… as a way to include one project in another by file reference. It is not exactly the same, and a nested project is not editable within the parent project. You must also ensure both projects use the same Video Mode.