更新视频介绍

docs/README.md

@@ -61,7 +61,7 @@
 
 我们精心准备了一个简单的十分钟介绍视频，方便你快速了解```uni-app```的主要特征：
 
-<video id="video" onplay="videoPlay()" preload="none" controls="controls" width="100%" poster="https://img-cdn-qiniu.dcloud.net.cn/uniapp/doc/poster.png" src="https://img.cdn.aliyun.dcloud.net.cn/guide/uniapp/%E7%AC%AC1%E8%AE%B2%EF%BC%88uni-app%E4%BA%A7%E5%93%81%E4%BB%8B%E7%BB%8D%EF%BC%89-%20DCloud%E5%AE%98%E6%96%B9%E8%A7%86%E9%A2%91%E6%95%99%E7%A8%8B@20181126.mp4"></video>
+<video id="video" onplay="videoPlay()" preload="none" controls="controls" width="100%" poster="https://img-cdn-qiniu.dcloud.net.cn/uniapp/doc/poster.png" src="https://img.cdn.aliyun.dcloud.net.cn/guide/uniapp/%E7%AC%AC1%E8%AE%B2%EF%BC%88uni-app%E4%BA%A7%E5%93%81%E4%BB%8B%E7%BB%8D%EF%BC%89-%20DCloud%E5%AE%98%E6%96%B9%E8%A7%86%E9%A2%91%E6%95%99%E7%A8%8B@20200317.mp4"></video>
 
 ### 为什么要选择uni-app？