fix: videoId with dashes broken on start

Ref: sarbagyastha#1128

Author: chungxon

packages/youtube_player_iframe/lib/src/controller/youtube_player_controller.dart

@@ -327,7 +327,7 @@ class YoutubePlayerController implements YoutubePlayerIFrameAPI {
 
   /// The unique player id.
   @internal
-  String get playerId => 'Youtube${key ?? hashCode}';
+  String get playerId => 'Youtube${key ?? hashCode}'.replaceAll('-', '_');
 
   /// MetaData for the currently loaded or cued video.
   YoutubeMetaData get metadata => _value.metaData;