Update simple_viewer for YoutbueVideoApp

lib/src/widgets/editor.dart

@@ -110,8 +110,7 @@ Widget _defaultEmbedBuilder(
               : Image.file(io.File(imageUrl));
     case 'video':
       final videoUrl = node.value.data;
-      if (videoUrl.contains('youtube.com') ||
-          videoUrl.contains('youtu.be')) {
+      if (videoUrl.contains('youtube.com') || videoUrl.contains('youtu.be')) {
         return YoutubeVideoApp(
             videoUrl: videoUrl, context: context, readOnly: readOnly);
       }

lib/src/widgets/simple_viewer.dart

@@ -21,6 +21,7 @@ import 'editor.dart';
 import 'text_block.dart';
 import 'text_line.dart';
 import 'video_app.dart';
+import 'youtube_video_app.dart';
 
 class QuillSimpleViewer extends StatefulWidget {
   const QuillSimpleViewer({
@@ -113,6 +114,10 @@ class _QuillSimpleViewerState extends State<QuillSimpleViewer>
                 : Image.file(io.File(imageUrl));
       case 'video':
         final videoUrl = node.value.data;
+        if (videoUrl.contains('youtube.com') || videoUrl.contains('youtu.be')) {
+          return YoutubeVideoApp(
+              videoUrl: videoUrl, context: context, readOnly: readOnly);
+        }
         return VideoApp(
             videoUrl: videoUrl, context: context, readOnly: readOnly);
       default: