custom rules for custom dataProcessor

Hello
I'm developing youtube plugin for two different variants of editor:
1. for administrators of site (it allows any html)
2. for users (users have to use BBCode)

In youtube plugin I add some custom rules in dataProcessor for creating fakeElement in place of youtube movies:
/ckeditor/plugins/youtube/plugin.js

afterInit : function( editor )
{
   var dataProcessor = editor.dataProcessor, dataFilter = dataProcessor && dataProcessor.dataFilter;
   if ( dataFilter )
   {
      dataFilter.addRules(
         {
            elements :
            {
               'cke:object' : function( element )
               {
// here i return null or createFakeElement( editor, element ); depending on values of src param inside object tag
               }
            }
         },
         1);
   }
}

And in BBCode plugin i create my own dataProcessor and set it to editor
Youtube plugin is added strictly after BBCode, so youtube dataFilter rules are added into my custom dataProcessor.
So, the problem is: Youtube dataFilter rules doesnt work together with BBCode plugin: instead of my custom youtube fakeelement i see real youtube preview of a movie.

What am i doing wrong? Is there any way to combine both plugins?