Technical affordances and archival practices An .mp4 extension situates the file within modern digital workflows: a container supporting video, audio, and metadata. The technical affordances matter for preservation and reuse. MP4 is widely compatible, enabling easy sharing but also exposing content to online circulation and potential decontextualization. Archivists mitigate this via sidecar files, checksum manifests, and controlled-access platforms. Imagine a university lab storing experiment captures: SIVR-171-D.mp4 would be accompanied by a JSON record noting participant consent, experiment parameters, and timestamps—allowing responsible reuse. Absent such records, the file becomes a brittle artifact: playable but epistemically impoverished.