实现的效果如下：
点击播放按钮之后弹出视频播放窗口并且显示遮罩层：
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>点击播放视频</title>
<link rel="stylesheet" href="../bootstrap-3.3.7-dist/css/bootstrap.min.css" />
<style type="text/css">
body{background-color: #0964}
.videolist { position:relative; float:left; width:540px; height:300px;margin-left: 230px;}
.videolist:hover{ cursor: pointer; }
.videoed { width:50px; height:50px; position: absolute; left:45%; top:40%; z-index:99; border-radius:100%; }
.videos{ display:none; border: 1px solid #080808; position:fixed; left:50%; top:50%; margin-left:-320px; margin-top:-210px; z-index:100; width:640px; height:360px; }
.vclose { position:absolute;right:1%; top:1%; border-radius:100%; cursor: pointer; }
.con{height: 430px; width: 1000px;margin: 0 auto;}
.masklayer{position: fixed;display: none;width: 100%;height: 1000px;top: 0px;left: 0px;background-color: rgba(0, 0, 0, 0.8);z-index: 1000;-webkit-user-select: none;-ms-user-select: none;}
</style>
</head>
<body>
<div class="video">
<div class="con" style="margin-top: 100px">
<div class="videolist" vpath="../img/圖片2.png" ipath="https://blz-videos.nosdn.127.net/1/OverWatch/AnimatedShots/Overwatch_AnimatedShot_CinematicTrailer.mp4">
<img src="../img/圖片2.png" width="540px" height="300px" /><!--背景图片-->
<img src="../img/播放Icon.png" class="videoed"/><!--播放按钮 -->
</div>
<div class="masklayer"><!--遮罩层-->
<div class="videos"></div><!--存放视频-->
</div>
</div>
</div>
<script src="../js/jquery.min.js"></script>
<script>
$('.one').each(function(){ //遍历视频列表
$(this).click(function(){ //视频被点击后执行
var img = $(this).attr('vpath');//获取视频预览图
var video = $(this).attr('ipath');//获取视频路径
$('.videos').html("<video id=\"video\" poster='"+img+"' style='width: 640px' src='"+video+"' preload=\"auto\" controls=\"controls\" autoplay=\"autoplay\"></video><img\"close1()\" class=\"vclose\" src=\"{DT_SKIN}tumo/ico-close.png\" width=\"25\" height=\"25\"/>");
$('.videos').show();//视频窗口弹出
$('.masklayer').show(); //遮罩层弹出
$('body').css('overflow', 'hidden'); //禁止滚动
winHeight = document.body.clientHeight;
$(".masklayer").height(winHeight + 5000 + "px");
});
});
function close1(){
var v = document.getElementById('video');//获取视频节点
$('.videos').hide();//点击关闭
$('.masklayer').hide();//遮罩层隐藏
v.pause();//停止
$('.videos').html();
}
</script>
</body>
</html>
