title: WPF MediaElement not playing video when application is started from .exe
body: <p>I've set a MediaElement with a video as window background for my application. It works, but only when I start the program from Visual Studio. If I try to start it from the builded .exe, the video in MediaElement won't load and the background remains black.
  This is my code:</p>
  
  <pre><code>&lt;Window.Background &gt;
      &lt;VisualBrush&gt;
          &lt;VisualBrush.Visual&gt;
              &lt;MediaElement Source="Resources/BF4R.wmv" LoadedBehavior="Play" IsMuted="True" MediaEnded="BGRAIN_MediaEnded" &gt;&lt;/MediaElement&gt;
          &lt;/VisualBrush.Visual&gt;
      &lt;/VisualBrush&gt;
  &lt;/Window.Background&gt;
  </code></pre>
  
  <p>and these are BF4R.wmv properties:</p>
  
  <p>Build Action: Content</p>
  
  <p>Copy to Output Directory: Copy always</p>