Any messages printed indicate corruption.
If the magic bytes confirm an MP4 container, rename the file to fhdarchivejuq988.mp4 (removing upd ) and attempt to play with VLC Media Player. fhdarchivejuq988mp4 upd
Many Network Video Recorders (NVRs) and IP cameras export clips with auto-generated names like fhdarchive_[random]_[timestamp].mp4 . If a firmware update was applied during export, the system may append upd to flag the file as updated or incomplete. Any messages printed indicate corruption