videos save upside down in movie maker

I have created a video using movie maker, saved it -- took about 5 hours -- and just now when I viewed it, my personal videos that i imported to movie maker all play upside down.   When I view my video on movie maker, the entire 42 minutes plays perfectly.  What is causing these videos to save upside down?  This along with a gazillion other problems with movie maker since upgrading to Windows 10 has already cost me about 60 plus hours of frustration and anger.  When I had Windows 7, I created many movies which I was at that time able to burn to a DVD and never had any problems.  Thanks Microsoft for messing up yet another one of your offered programs without notification of your intentions.