diff -r 5f8d275750e7 -r 644e3cd48034 client/src/Iri.Modernisation.Controls/View/VideoViewer/VideoViewer.xaml.cs
--- a/client/src/Iri.Modernisation.Controls/View/VideoViewer/VideoViewer.xaml.cs	Fri Jan 08 11:33:24 2010 +0100
+++ b/client/src/Iri.Modernisation.Controls/View/VideoViewer/VideoViewer.xaml.cs	Thu Jan 14 16:39:50 2010 +0100
@@ -108,7 +108,7 @@
 
         void Play_Executed(object sender, SLExtensions.Input.ExecutedEventArgs e)
         {
-            if (e.Parameter == DataContext || e.Parameter == null)
+            if ((e.Parameter == DataContext || e.Parameter == null) && VideoScreen.Source != null)
             {
                 _isPlayed = true;
                 VideoScreen.Play();