Movie Maker used to work: now, video heard but not seen

I've read strings about this problem dating back to last summer. Microsoft, any update? I used to be able to watch my movies (MPG3) on my Windows 10 desktop and then it stopped.  I can hear the audio but the scrren is black.  However, I can view the same clips perfectly from the cloud using my iphone.  What's the fix for this?  Uninstall Essentials? I liked using Movie Maker but maybe I need to switch to something else if this can't be fixed.  Help!