Many digital video recorders (DVRs) and dashcams use a standardized naming convention based on: Often stands for "Group" or "General."
Often found on 4chan's /x/ board, Reddit mystery subs, or obscure YouTube channels. g354.mp4
These are typically designed to be "decoded" using spectrographs or by frame-by-frame analysis. 2. CCTV or Dashcam Exports Many digital video recorders (DVRs) and dashcams use