Nm18.mp4

: Look for frame-by-frame changes. ARGs often hide text or QR codes in single frames that are invisible at normal playback speeds.

: Is the video mostly static or high-pitched noise? That is a primary indicator that the "guide" is hidden in the audio spectrogram. NM18.mp4

: Open the audio from the MP4 in a tool like Audacity . Switch to "Spectrogram" view to see if any images or text have been embedded into the sound frequencies. : Look for frame-by-frame changes