What to look for : Look for unusual comments, "Artist" tags, or GPS coordinates that might be part of a multi-part challenge.
: [e.g., Spectrogram of Audio Stream / Appended Zip File] Tools Used : ExifTool, Audacity, Binwalk. Flag : CTFtango_down_part_3_success (Example) tango part3mp4
Metadata can often hide clues about the tool used to create the file or direct "leaks" of the flag. : Run exiftool tango_part3.mp4 . What to look for : Look for unusual