Play a local file

Topics: Windows 10 UWP
Feb 26 at 6:07 PM
Can I play a local file with this framework? I can do it if the video is in my Assets folder but elsewhere I get the message "Failed to play the video. Retry".
It also works great with the barebone MediaElement and MediaPlayerElement by setting the Source to "new Uri(file.path)".
I can't see what i'm doing wrong.
Any help is appreciated.
Thank you.