Restore a damaged (truncated) mp4, m4v, mov, 3gp video. Provided you have a similar not broken video. And some luck.
This comes from: untrunc by ponchio
docker run -v /some/directory:/volume/in/container -it synctree/untrunc /volume/in/container/good-file.mp4 /volume/in/container/bad-file.mp4