Lossless Convert MNM4 Videos to format playable by Windows Media , like mov or mp4

I have 3 video files which I am unable to view in Windows Media, Quicktime or VLC player. The error is that the files are in MNM4 format. The project is to convert these files to a viewable format for Windows Media, or Quicktime, with little to no loss in quality. I have attached one of the files as an example. The largest file is 311Kb and the smallest is 19Kb. Thank you.