Some home security systems or "nanny cam" software export motion-detected clips into daily compilations.

A "comp" often stands for "compilation." This could be several clips of webcam footage (vlogs, video diary entries, or reaction videos) stitched together.

Look at the "Date Created" and "Size" to see if it matches a specific event.

If you or someone you know uses software like OBS Studio , this might be a collection of "facecam" highlights from a gaming session.

Open it with . It is the most reliable tool for .mkv files and can handle most video codecs. Check for Malware:

If you can tell me (e.g., your own Documents folder, an old USB drive, or a download link), I can give you a much more specific idea of what it might be.

Upload the file to to ensure it isn't a script disguised as a video. ❓ Troubleshooting File Issues