The filename appears to be a default timestamp-based name typically generated by recording software like OBS Studio , ShadowPlay , or security camera systems .
.mkv (Matroska Video), a container often used for high-quality recordings, multiple audio tracks, or subtitle streams. Likely Origins 2021-08-07 03-37-54.mkv
Many security systems use ISO 8601 timestamps to organize archives for easy searching by time and date. The filename appears to be a default timestamp-based
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. multiple audio tracks