Mswmm

What is MSWMM file?
The MSWMM file type is associated with Window Movie Maker. Windows Movie Maker allows you to edit videos and share home videos. When your movies are complete, you can save the file as an MSWMM project file, which is not a real video file, but you can import the MSWMM project file to Windows Movie Maker when you need to review or make further editing. A MSWMM project file could not be played on your computer; neither does it be able to be converted to DVD directly.
Then, how to play MSWMM on computer?
The MSWMM file could only be viewed in Windows Movie Maker. If you want to play MSWMM and watch MSWMM files on your computer, you need to firstly convert MSWMM to WMV for Windows movie player or other portable players. You can open *.MSWMM file in Windows Movie Maker (click "File > Open Project"), use the File > Save Movie menu option and you should end up with a .WMV file. Or go to the "Tasks" bar, click "Finish Movie" and then click "Save to my computer". By converting MSWMM to WMV, now you can freely play MSWMM on computer. Or you can just convert MSWMM to DVD and enjoy it on your DVD Player. Leawo DVD creator can do this.