Add FakeElement without plugin

Hello, I want to add some fake element without a plugin, only using a button in the page.

I Use this script:

function Fake()
{
   var editor = CKEDITOR.instances.editor1;
   
	CKEDITOR.addCss( 'img.cke_iframe' +
				'{' +
					'background-image: url(' + CKEDITOR.getUrl( this.path + 'images/placeholder.png' ) + ');' +
					'background-position: center center;' +
					'background-repeat: no-repeat;' +
					'border: 1px solid #a9a9a9;' +
					'width: 500px;' +
					'height: 400px;' +
				'}'
				);
				

   
	var dataProcessor = editor.dataProcessor,
				dataFilter = dataProcessor && dataProcessor.dataFilter;

			if ( dataFilter ) {
				dataFilter.addRules({
					elements: {
						iframe: function( element ) {
							return editor.createFakeParserElement( element, 'cke_iframe', 'div', true );
						}
					}
				});
			}
  
   
  var sHTML = "<object> class=mizu-video selThisselThis</object>";
   
  var realElement = CKEDITOR.dom.element.createFromHtml( sHTML );
  var fakeElement = editor.createFakeElement( realElement, 'cke_iframe', 'video', true );
   editor.insertElement(fakeElement);
}

And it work the first time i launch Fake() with a button. But if I switch to source mode and then i return the placeholder disappear and also the content: in the source I have only 

<object></object>

Can you help me?