G9169.mp4 «FULL × Checklist»

Try opening the file using VLC Media Player . VLC is highly secure, open-source, and contains built-in codecs to play obscure or slightly corrupted video files that default players like Windows Media Player or QuickTime cannot read.

Where exactly did you or what context can you share to help narrow this down? g9169.mp4

Right-click the file and select "Properties" (Windows) or "Get Info" (Mac). If the file is only a few kilobytes (KB), it is likely a corrupted file or a text document with a false extension. If it is several megabytes (MB) or gigabytes (GB), it is an actual video. Try opening the file using VLC Media Player