"fhdarchivejuq988mp4 upd" appears to be a specific filename or search string used within file-sharing networks and adult content indexing sites.
: Never double-click an .upd file unless it comes from a verified software vendor. Instead, inspect it using a hex editor or file command on Linux/macOS: fhdarchivejuq988mp4 upd
If you found this file in a professional environment (e.g., a surveillance DVR, a backup server), consult the original software’s documentation for naming conventions. For personal files, treat it as a corrupted video archive and follow the recovery steps above. "fhdarchivejuq988mp4 upd" appears to be a specific filename