A very small file (KB) is likely a short clip or meme; a large file (MB/GB) is likely a full video or high-definition recording.
If you have the file and are trying to figure out what it is without opening it, you can: 39518.mp4
For example, did you see this mentioned in a specific forum, find it on a hard drive, or receive it as a link? Knowing the source would help me track down exactly what this specific file contains. A very small file (KB) is likely a
Many NVR (Network Video Recorder) systems use numerical strings to timestamp or index clips. you can: For example