https://github.com/chamilo/chamilo-lms/commit/08a54874ed506d8a50ca7c0c161181947487eb20
@@ -9,6 +9,10 @@ CKEDITOR.dialog.add( 'video', function ( editor )
if ( !value && this.id=='id' )
value = generateId();
+ if (value == '') {
+ return;
+ }
+
videoNode.setAttribute( this.id, value);
if ( !value )