Metadata can often hide clues about the tool used to create the file or direct "leaks" of the flag. : Run exiftool tango_part3.mp4 .
: Run file tango_part3.mp4 to ensure it is actually a valid MPEG-4 video and not a renamed archive or binary. tango part3mp4
: Check if other files (like a .zip or .txt ) are appended to the end of the video using binwalk -e tango_part3.mp4 . 3. Media Stream Analysis Metadata can often hide clues about the tool
: Use ffmpeg -i tango_part3.mp4 -vf "negate" output.mp4 to invert colors or extract every frame to a folder for automated scanning: ffmpeg -i tango_part3.mp4 thumb%04d.jpg -hide_banner Summary of Findings tango part3mp4