Unable to make plugin working

I've downloaded youtube plug-in. Now how to make the youtbe button apear in the editor tools?
Why this isn't documented anywhere?
Part of my config.js:

//LOADING PLUGIN (returns object correctly, but doesn't work 
CKEDITOR.plugins.load( 'youtube', function( plugins )
    {
        alert( plugins['youtube'] );  // "object"
        window.JDJD = plugins['youtube'];
    });
CKEDITOR.config.toolbar_Admin =
  [
     { name: 'document',      items : [ 'Source','-','Save','NewPage','DocProps','Preview','-','Templates' ] },
     { name: 'editing',      items : [ 'Find','Replace','-','SelectAll' ] },
     //{ name: 'forms',      items : [ 'Form', 'Checkbox', 'Radio', 'TextField', 'Textarea', 'Select', 'Button', 'ImageButton', 'HiddenField' ] },
     '/',
     { name: 'basicstyles',   items : [ 'Bold','Italic','Underline','Strike','-','JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock','-','RemoveFormat' ] },
    { name: 'styles',      items : [ 'Format','Font','FontSize', '-','TextColor','BGColor' ] },
     { name: 'paragraph',   items : [ 'NumberedList','BulletedList','-','Outdent','Indent','-','Blockquote'/*,'CreateDiv'*/] },
     { name: 'links',      items : [ 'Link','Unlink'] },
//USING YOUTUBE PLUGIN
     { name: 'insert',      items : [ 'Image','Flash', 'Youtube', 'Table','HorizontalRule','SpecialChar'] },
     '/',
     { name: 'tools',      items : [ 'Maximize', 'ShowBlocks','-','About' ] }
];