20220606-6_720pmp4 Online

: Many CCTV and dashcam systems auto-save clips using the date (YYYYMMDD) and a sequence number.

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. 20220606-6_720pmp4

: Indicates this is the sixth clip or segment in a series from that day. : Many CCTV and dashcam systems auto-save clips

While there is no public "official" document by this exact name, this file format is commonly associated with: a specific workplace internal system

: The MPEG-4 Part 14 container format, widely used for its balance of high quality and small file size.