使用width属性
如果 width 属性设置为 100%，视频播放器会根据屏幕大小自动调整比例：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8">
<title>自学教程(如约智惠.com)</title>
<style>
video {
width: 100%;
height: auto;
}
</style>
</head>
<body>
<video width="400" controls>
<source src="mov_bbb.mp4" type="video/mp4">
<source src="mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>
<p>调整浏览器窗口大小查看视频播放器变化</p>
</body>
</html>注意在以上实例中，视频播放器根据屏幕大小自动调整比例，且可以比原始尺寸大。更多情况下我们可以使用 max-width 属性来替代。
使用 max-width 属性
如果 max-width 属性设置为 100%, 视频播放器会根据屏幕自动调整比例，但不会超过其原始大小：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8">
<title>自学教程(如约智惠.com)</title>
<style>
video {
max-width: 100%;
height: auto;
}
</style>
</head>
<body>
<video width="400" controls>
<source src="mov_bbb.mp4" type="video/mp4">
<source src="mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>
<p>调整浏览器窗口大小，在宽度小于 400px 时，查看视频播放器的变化。</p>
</body>
</html>在网页中添加视频
我们可以在网页中添加视频。以下实例视频根据 div 区域大小自动调整并占满整个 div 区域：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8">
<title>自学教程(如约智惠.com)</title>
<style>
* {
box-sizing: border-box;
}
video {
width: 100%;
height: auto;
}
.row:after {
content: "";
clear: both;
display: block;
}
[class*="col-"] {
float: left;
padding: 15px;
width: 100%;
}
@media only screen and (min-width: 600px) {
.col-s-12 {width: 8.33%;}
.col-s-2 {width: 16.66%;}
.col-s-3 {width: 25%;}
.col-s-4 {width: 33.33%;}
.col-s-5 {width: 41.66%;}
.col-s-6 {width: 50%;}
.col-s-7 {width: 58.33%;}
.col-s-8 {width: 66.66%;}
.col-s-9 {width: 75%;}
.col-s-10 {width: 83.33%;}
.col-s-11 {width: 91.66%;}
.col-s-12 {width: 100%;}
}
@media only screen and (min-width: 768px) {
.col-1 {width: 8.33%;}
.col-2 {width: 16.66%;}
.col-3 {width: 25%;}
.col-4 {width: 33.33%;}
.col-5 {width: 41.66%;}
.col-6 {width: 50%;}
.col-7 {width: 58.33%;}
.col-8 {width: 66.66%;}
.col-9 {width: 75%;}
.col-10 {width: 83.33%;}
.col-11 {width: 91.66%;}
.col-12 {width: 100%;}
}
html {
font-family: "Lucida Sans", sans-serif;
}
.header {
background-color: #9933cc;
color: #ffffff;
padding: 15px;
}
.menu ul {
list-style-type: none;
margin: 0;
padding: 0;
}
.menu li {
padding: 8px;
margin-bottom: 7px;
background-color :#33b5e5;
color: #ffffff;
box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}
.menu li:hover {
background-color: #0099cc;
}
.aside {
background-color: #33b5e5;
padding: 15px;
color: #ffffff;
text-align: center;
font-size: 14px;
box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}
.footer {
background-color: #0099cc;
color: #ffffff;
text-align: center;
font-size: 12px;
padding: 15px;
}
</style>
</head>
<body>
<div class="header">
<h1>Chania</h1>
</div>
<div class="row">
<div class="col-3 col-s-3 menu">
<ul>
<li>The Flight</li>
<li>The City</li>
<li>The Island</li>
<li>The Food</li>
</ul>
</div>
<div class="col-6 col-s-9">
<h1>The City</h1>
<p>Chania is the capital of the Chania region on the island of Crete. The city can be divided in two parts, the old town and the modern city.</p>
<video width="400" controls>
<source src="mov_bbb.mp4" type="video/mp4">
<source src="mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>
</div>
<div class="col-3 col-s-12">
<div class="aside">
<h2>What?</h2>
<p>Chania is a city on the island of Crete.</p>
<h2>Where?</h2>
<p>Crete is a Greek island in the Mediterranean Sea.</p>
<h2>How?</h2>
<p>You can reach Chania airport from all over Europe.</p>
</div>
</div>
</div>
<div class="footer">
<p>Resize the browser window to see how the content respond to the resizing.</p>
</div>
</body>
</html>