fix:课节上传视频文件类型补充

src/modules/course-manage/video-course/AddVideoCourse.jsx

 /*
  * @Author: 吴文洁
  * @Date: 2020-08-05 10:07:47
- * @LastEditors: wufan
- * @LastEditTime: 2021-07-15 19:53:52
+ * @LastEditors: yuananting
+ * @LastEditTime: 2021-07-15 20:23:12
  * @Description: 线上课新增/编辑页
  * @Copyright: 杭州杰竞科技有限公司 版权所有
  */
@@ -320,7 +320,7 @@ class AddVideoCourse extends React.Component {
       console.log('')
       const { ossUrl, resourceId, folderName, folderFormat, folderSize } = file;
       console.log('folderFormat',folderFormat);
-      if(folderFormat === 'MP4'){
+      if(folderFormat === 'MP4' || folderFormat === 'video/mp4'){
         const videoDom = document.createElement('video')
         videoDom.src = ossUrl
         videoDom.onloadedmetadata = () => {