B5_120.mp4

You can use tools like ExifTool to see when and where the video was recorded, which might clarify its origin.

"B5" often refers to a building floor (Basement 5) or a specific camera zone, while "120" might indicate a timestamp or sequence number. b5_120.mp4

Large organizations often use alphanumeric codes to catalog internal training modules. You can use tools like ExifTool to see