This indicates it is the 86th video recorded in that specific session or folder.
If you can tell me what device recorded this (e.g., a Garmin dashcam, a Samsung phone, a drone) or where you saw the name, I can give you a much more specific technical feature list for that exact model. Which device or app produced this file?
The primary "feature" of a name like S0086.mp4 is . The "S": Usually stands for "Stream" or "Sequence."
Once the device reaches a high number (like S9999 ), it typically starts over at S0001 , deleting the oldest files to make room for new ones.
If this file appeared on a dashcam or security camera, a key feature is .
This allows you to record long sessions (like a 2-hour drive on a dashcam or a long family video) without filling up your SD card instantly. It maintains high visual quality while keeping the file size small enough to share easily. 3. Loop Recording (Common for Dashcams)