If this is a specific file you have encountered, it likely falls into one of these categories:
: A generic name used on file-sharing sites or forums. vid_849.mp4
To provide a helpful review, I wouldCould you describe the of the video, where you found it, or the genre it belongs to? If this is a specific file you have
: Many internet mysteries use "raw" filenames like this to add a sense of realism or "found footage" to their storytelling. where you found it