: Change the name from _ghsb(1)mp4 to _ghsb(1).mp4 .

: This is the intended file extension. However, because there is no dot (e.g., .mp4 ), your computer or phone may not recognize it as a video and might treat it as a "generic file." How to Fix and Open It

: You should now be able to open it with any standard video player like VLC, QuickTime, or your phone's gallery app.