: Right-click the file and select "Open with" to choose a preferred player like Windows Media Player or VLC.
The ".mp4" extension indicates that the file uses a standard developed by the Moving Pictures Experts Group (MPEG). SDJS-129.mp4
If you have encountered this specific file, you can generally open it using standard tools: : Right-click the file and select "Open with"
: It is one of the most compatible formats, playable on almost every piece of hardware and software today. SDJS-129.mp4