feat:处理课程预览的显示

src/modules/course-manage/modal/PreviewCourseModal.jsx

@@ -2,7 +2,7 @@
  * @Author: 吴文洁
  * @Date: 2020-07-23 14:54:16
  * @LastEditors: Please set LastEditors
- * @LastEditTime: 2021-07-14 11:42:47
+ * @LastEditTime: 2021-07-14 18:17:49
  * @Description: 大班直播课预览弹窗
  * @Copyright: 杭州杰竞科技有限公司 版权所有
  */
@@ -166,12 +166,7 @@ class PreviewCourseModal extends React.Component {
           <div className='container__header'>
               <Choose>
                 <When condition={type === 'videoCourse'}>
-                  <video
-                    controls
-                    src={courseChapterList.length && courseChapterList[0].mediaUrl || scheduleVideoUrl }
-                    poster={coverUrl ? coverUrl : `https://image.xiaomaiketang.com/xm/TwtGPQGE4K.png`}
-                    className='course-url'
-                  />
+                   <img src={coverUrl ? coverUrl : `https://image.xiaomaiketang.com/xm/TwtGPQGE4K.png`} className='course-cover' alt='' />
                 </When>
                 <Otherwise>
                   <img src={coverUrl} className='course-cover' alt='' />