If you have a recent Ubuntu distribution, you can install docker and run:

docker run -v `pwd`:/vol -it synctree/untrunc /vol/GOOD-reference-file.MP4 /vol/BAD-corrupt-file.mdt

Read the other comments around for more in-depth explanation.

This was the quickest for me!

You can install docker (available for all major operating systems) and run:

docker run -v $(pwd):/vol -it synctree/untrunc /vol/GOOD-reference-file.MP4 /vol/BAD-corrupt-file.mdt

The syntax is for Bash under Linux or macOS. Here, GOOD-reference-file.MP4 and BAD-corrupt-file.md5 must both be in your current directory, and the directory will be mounted to /vol in the Docker container.

Read the other comments around for more in-depth explanation.

This was the quickest for me!