fix playlist continuationToken retrieval

Author: khaled-0

lib/src/reverse_engineering/pages/playlist_page.dart

@@ -157,13 +157,22 @@ class _InitialData extends InitialData {
       ?.getT<String>('text')
       .parseInt();
 
-  late final String? continuationToken =
-      (videosContent ?? playlistVideosContent)
-          ?.firstWhereOrNull((e) => e['continuationItemRenderer'] != null)
-          ?.get('continuationItemRenderer')
-          ?.get('continuationEndpoint')
-          ?.get('continuationCommand')
-          ?.getT<String>('token');
+  String? get continuationToken {
+    final continuationEndpoint = (videosContent ?? playlistVideosContent)
+        ?.firstWhereOrNull((e) => e['continuationItemRenderer'] != null)
+        ?.get('continuationItemRenderer')
+        ?.get('continuationEndpoint');
+
+    return continuationEndpoint
+            ?.get('continuationCommand')
+            ?.getT<String>('token') ??
+        continuationEndpoint
+            ?.get('commandExecutorCommand')
+            ?.getList('commands')
+            ?.firstWhereOrNull((e) => e['continuationCommand'] != null)
+            ?.get('continuationCommand')
+            ?.getT<String>('token');
+  }
 
   List<JsonMap>? get playlistVideosContent =>
       root

test/playlist_test.dart

@@ -56,6 +56,17 @@ void main() {
     expect(videos.length, greaterThan(100));
   });
 
+  test('Get a shit ton of items from a playlist', () async {
+    final videos = await yt!.playlists
+        .getVideos(
+          PlaylistId(
+            'https://www.youtube.com/playlist?list=PLI_eFW8NAFzYAXZ5DrU6E6mQ_XfhaLBUX',
+          ),
+        )
+        .toList();
+    expect(videos.length, greaterThan(3500));
+  }, timeout: Timeout(Duration(minutes: 3)));
+
   group('Get videos in any playlist', () {
     for (final val in {
       PlaylistId('PLI5YfMzCfRtZ8eV576YoY3vIYrHjyVm_e'),