diff --git a/www/content/README.md b/www/content/README.md
index 936d5ae..fd295f6 100644
--- a/www/content/README.md
+++ b/www/content/README.md
@@ -38,7 +38,7 @@ FileSite.io希望帮助到他们：
 5. 如何在macos中挂载远程磁盘来管理图片等内容
 
 <div style="max-width:1024px">
-  <video width="100%" preload="metadata" playsinline controls>
+  <video width="100%" preload="metadata" playsinline controls poster="https://static.jialuoma.cn/img/video_docker_pull_run_machete_1210_snap.png">
     <source src="https://static.jialuoma.cn/mp4/video_docker_pull_run_machete_1210.mp4" type="video/mp4">
   </video>
 </div>