The string you provided seems to follow a specific naming convention, possibly indicating the quality (FHD, which stands for Full High Definition), a specific archive or collection identifier ("fhdarchivejuq"), a version or sequence number ("988"), and the file format ("mp4"). The "upd" at the end might suggest an update or a specific version of the file.
How to inspect/verify locally (commands) fhdarchivejuq988mp4 upd