C4-hq.mp4 -

: "C4" is frequently used as a label for a specific camera (e.g., Camera 4) in surveillance systems.

: It may be a specific "cut" or "clip" (Clip 4) from a larger video editing project. Safety Warning c4-HQ.mp4

: Open the file in a secure, isolated environment if you are unsure of its origin. : "C4" is frequently used as a label