I moved the Phantom 3 Pro MP4 videos from my Android phone to a Windows 10 PC.  They won't play in Media Player or the Movies & TV apps.  Can anyone recommed a way to view these video files?  

George

Download 'VLC' media player and use that instead of windows media player = problem sorted

You can download converterlite (its free) and convert your videos from the Quicktime format to a variety of formats.

Strange, my HP Envy Phoenix i7 running Windows 10, plays the Phantom 3 Pro', 4K vids  just fine.

I Never had to add any programs, or services.

RedHotPoker

Second  for VLC, it plays just everything.

If that still doesn't work, you'd better convert the Phantom 3 Pro MP4 to a more Windows 10 "native" format like WMV  using video converter tools.

http://www.digiber.com/convert/mp4-to-wmv-mac-pc.html