OBS Studio defaults to this naming convention ( YYYY-MM-DD HH-MM-SS.mkv ). This specific file would represent a session recorded in the early morning hours of August 7, 2021.

Since .mkv is a flexible container, VLC is the most reliable tool to play it regardless of the internal codecs.

Use a tool like MediaInfo to see the technical metadata (resolution, frame rate, and what software encoded it).

Many security systems use ISO 8601 timestamps to organize archives for easy searching by time and date.

If you found this file on your computer or a shared drive, it is most likely:

If the video won't play, it may be a "broken" recording (common if OBS crashed during the 3:37 AM session). You can try using Untrunc or FFmpeg to repair the header.

Files shared on these platforms often retain their original system-generated filenames if they aren't renamed by the uploader. How to "Develop" the Content

.mkv (Matroska Video), a container often used for high-quality recordings, multiple audio tracks, or subtitle streams. Likely Origins