: Most modern systems can play these files automatically using Windows Media Player or QuickTime.
Can you tell me or what the video is about? That would help me track down if it's part of a specific project or software. How to Create and Open an MP4 File 21864593372 mp4
: It is optimized for internet streaming and is natively supported by HTML5 for web playback. How to Use or Open the File : Most modern systems can play these files