ckeditor 4.7.1不保存youtube嵌入代码

Question

我尝试将嵌入代码插入到我的4.7.1 ckeditor中失败。我点击SOURCE ...粘贴嵌入代码...再次点击源...视频显示，我甚至可以播放视频。当我去保存＆＃34;帖子＆＃34;文本和视频唯一剩下的就是文本。 iframe已替换为<p>&nbsp;</p>。这是我的config.js文件：

CKEDITOR.editorConfig = function( config ) {
    // Define changes to default configuration here.
    // For complete reference see:
    // http://docs.ckeditor.com/#!/api/CKEDITOR.config

    // The toolbar groups arrangement, optimized for two toolbar rows.
    config.toolbarGroups = [
        { name: 'clipboard',   groups: [ 'clipboard', 'undo' ] },
        { name: 'editing',     groups: [ 'find', 'selection', 'spellchecker' ] },
        { name: 'links' },
        { name: 'insert' },
        { name: 'forms' },
        { name: 'tools' },
        { name: 'document',    groups: [ 'mode', 'document', 'doctools' ] },
        { name: 'others' },
        '/',
        { name: 'basicstyles', groups: [ 'basicstyles', 'cleanup' ] },
        { name: 'paragraph',   groups: [ 'list', 'indent', 'blocks', 'align', 'bidi' ] },
        { name: 'styles' },
        { name: 'colors' },
        { name: 'about' }
    ];

    // Remove some buttons provided by the standard plugins, which are
    // not needed in the Standard(s) toolbar.
    config.removeButtons = 'Underline,Subscript,Superscript';

    // Set the most common block elements.
    config.format_tags = 'p;h1;h2;h3;pre';
    // Simplify the dialog windows.
    config.removeDialogTabs = 'image:advanced;link:advanced';
    config.extraAllowedContent = 'p(*)[*]{*};div(*)[*]{*};li(*)[*]{*};ul(*)[*]{*};iframe(*)[*]{*}';
    config.allowedContent = true;
};