Generate and Analyse Expert Advisors
You can use tools like the VLC Media Player or Mediainfo to see the codec, resolution, and potentially the original creation date, which can give you a clue about its origin.
Many DVR and NVR systems (like those from Lorex or Hikvision) use randomized or encoded naming conventions (e.g., COL for "Collection" or a specific camera group). Download File COLTESUBW.mp4
The file can store video, audio, subtitles, and even still images. You can use tools like the VLC Media