Files with this specific naming structure are almost exclusively short-form videos featuring amateur or "webcam" style footage.
MP4 files of this nature vary wildly. Older uploads or those labeled with high numbers often suffer from "generation loss" (quality degradation from being re-uploaded) or may be lower resolution (480p or 720p).
Be cautious when downloading or clicking links for files named in this format from unknown sources. They are frequently used as "clickbait" to distribute malware, adware, or to lead users to phishing sites.