Use steghide or stegseek if there are images included in the archive.
: Open the video's audio track in Audacity . Switch to the "Spectrogram" view. Flags or codes are often visually drawn into the audio frequencies (a technique called "audio steganography"). video_2018-09-08_12-40-50.7z
If you are working through a challenge involving this file, here is the standard write-up methodology for an archive of this nature: 1. Initial Triage Use steghide or stegseek if there are images