If you are looking for the specific content within a video you found, it likely belongs to a private archive, a specific workplace internal system, or a local security DVR.

: Indicates this is the sixth clip or segment in a series from that day.

: Some online courses, such as those seen on platforms like YouTube , use date-coded exports for weekly video overviews or lecture modules.

"20220606-6_720p.mp4" appears to be a standard naming convention for a video file recorded or exported on , specifically the sixth file generated that day, in 720p HD resolution (