Using binwalk or foremost to see if other files (like images or zip folders) are hidden within the video stream.
The first step in a write-up is identifying the file's integrity and basic properties. 21892mp4
Checking for data hidden in the Least Significant Bits of the video frames. Using binwalk or foremost to see if other
Using ffmpeg to export every frame as a PNG for individual inspection. the date/time of the incident
If this specific file is part of a (e.g., a "write-up" for an employee viewing or sharing this file), the documentation should objectively describe the policy violation, the date/time of the incident, and the specific company technology policy that was breached.