The full name is likely a video (MP4) that lives inside an archive and was generated by a system that appends a random identifier for uniqueness. The “3” could mean third segment of a split video, camera #3 footage, or simply Version 3 .
The file extension ".mp4" indicates that the file is in MPEG-4 Part 14 format, a common container format for video and audio streams. This format is widely used for sharing video content over the internet due to its compatibility with a broad range of devices and platforms. archivefhdjufe568 3mp4