: This often refers to a grid layout or aspect ratio segment . For example, it might indicate a video that shows a 2-row by 3-column grid of camera feeds.
Knowing if it came from a corporate archive, a security system, or a private data dump would help narrow down its exact purpose. 0001644600-19-000023.txt - SEC.gov Chvq1 2x3.Zvb sp4.mp4
: Similar alphanumeric strings appear in the raw text of SEC.gov archives , where they represent unique identifiers for document attachments. : This often refers to a grid layout or aspect ratio segment