Because these files are usually proprietary or specific to a narrow field, reviews are often focused on the technical delivery rather than the "content" as entertainment:
Could you provide more or what subject matter you expect it to contain? Operating Systems Design MP4: Linux Security Modules
In professional sports broadcasting, LSM (Live Slow Motion) systems like the EVS LSM-VIA are used to create replay clips. A file named this way could be a specific clip exported from such a system during a live event.
Ensure you have a player like VLC that supports various MP4 encoding profiles.