video.js视频高度自适应解决方法
1.引入两个外部文件，或者下载到本地
<link href="https://unpkg.com/video.js/dist/video-js.css" rel="stylesheet">
<script src="https://unpkg.com/video.js/dist/video.js"></script>
2.设置video标签的class为“video-js vjs-default-skin vjs-big-play-centered vjs-16-9”
具体代码：
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<title>详情</title>
<link rel="stylesheet" href="../../css/video.css" />
<script type="text/javascript" src="../../js/video.js" ></script>
</head>
<body>
<div class="pageContent">
<video id="my-video" class="video-js vjs-default-skin vjs-big-play-centered vjs-16-9" controls preload="auto" poster="" data-setup="{}">
<source src="http://1256913445.vod2.myqcloud.com/d48fa54fvodtransgzp1256913445/a387f9385285890780745318298/v.f20.mp4" type="video/mp4"></source>
</video>
</div>
</body>
</html>效果：
