3137.mp4 | HD |

If the video looked normal, did you check the audio track? Mention if you used Audacity or Sonic Visualizer to look at the Spectrogram for hidden text.

If you found something in a single frame, explain how you extracted it using ffmpeg -i 3137.mp4 -vf "select=eq(n\,3137)" -vframes 1 out.png . 3137.mp4

Briefly state what the goal was (e.g., "Find the hidden flag within the video file"). If the video looked normal, did you check the audio track