Video player develop,emt 3

FoxTube/VideoPlayer.xaml.cs

@@ -40,6 +40,8 @@ namespace FoxTube
         private bool fullScreen = false;
         private bool pointerCaptured = false;
 
+        UIElement rootBackup;
+
         TimeSpan elapsed;
         TimeSpan remaining;
         TimeSpan total;
@@ -95,7 +97,7 @@ namespace FoxTube
 
             item = response.Items[0];
 
-            if(item.ContentDetails.ContentRating.RussiaRating == "russia18")
+            if(item.ContentDetails.ContentRating != null && item.ContentDetails.ContentRating.YtRating == "ytAgeRestricted")
             {
                 matureBlock.Visibility = Visibility.Visible;
                 return;
@@ -321,19 +323,21 @@ namespace FoxTube
 
         }
 
-        private async void fullscreen_Click(object sender, RoutedEventArgs e)
+        private void fullscreen_Click(object sender, RoutedEventArgs e)
         {
-            if (miniViewed)
-                miniViewed = await ApplicationView.GetForCurrentView().TryEnterViewModeAsync(ApplicationViewMode.Default);
-
             if (fullScreen)
             {
+                Window.Current.Content = rootBackup;
                 ApplicationView.GetForCurrentView().ExitFullScreenMode();
                 fullScreen = false;
             }
-            else fullScreen = ApplicationView.GetForCurrentView().TryEnterFullScreenMode();
+            else
+            {
+                rootBackup = Window.Current.Content;
+                Window.Current.Content = this;
+                fullScreen = ApplicationView.GetForCurrentView().TryEnterFullScreenMode();
+            }
             if ((string)fullscreen.Content == "")
-
                 fullscreen.Content = "";
             else fullscreen.Content = "";
         }