: These apps often rename saved media to a numeric string based on the internal server ID or timestamp of when it was sent or received.
If you are trying to find the source of this specific video: 165289019596.mp4
: It is the industry standard for web streaming because it provides a high balance between video quality and small file size. : These apps often rename saved media to
I can help you track down more specific information if you have a summary of the footage. What is an MP4 Video File? - Legacybox 165289019596.mp4