HTML5 <video> - 使用 DOM 进行控制
为视频创建简单的播放/暂停以及调整尺寸控件：
代码如下：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title></title>
<style type="text/css">
.box{
text-align: center;
}
</style>
</head>
<body>
<div class="box">
<button onclick="playPase()">播放/暂停</button>
<button onclick="makeBig()">大</button>
<button onclick="makeNormal()">中</button>
<button onclick="makeSmall()">小</button>
<br>
<video id="video1" width="420" style="margin-top: 15px;">
<source src="video/despacito.mp4" type="video/mp4">
<source src="video/despacito.ogg" type="video/video/ogg">
</video>
</div>
<script type="text/javascript">
var Ovideo=document.getElementById("video1");
function playPase(){
if(Ovideo.pause){
Ovideo.play();
}else{
Ovideo.pause();
}
}
function makeBig(){
Ovideo.width=560;
}
function makeSmall(){
Ovideo.width=320;
}
function makeNormal(){
Ovideo.width=420;
}
</script>
</body>
</html>
运行结果如图