title: Show photo, video, mp3 in system app
body: <p>I have one simple desire: Open media like video (MOV), image (JPG) or music (MP3) in the default iOS app for that media.
  I tried this for a MOV file which is in the apps documents folder, which has the correct rights set to access that folder, but it never works.
  <code>UIApplication.shared.openURL(url)</code> is the call I tried, it doesn't work.</p>
  
  <p>Is this even possible?</p>