: This often refers to a sequence number, a specific camera setting (like a 730nm infrared filter), or an internal project code.

: Digital Video Recorders (DVRs) often export clips using date-time stamps and camera identifiers (e.g., "Paco" might be the name of a specific entrance or hallway).

: This is the primary subject or project name. It could refer to a person (Paco), a specific location, or a brand name.