<!DOCTYPE html>
<html>
<head>
<title>Operation Aborted Example</title>
<style>
body{
margin: 0;
}
#video{
position:fixed;
right: 0;
bottom: 0;
min- 100%;
min-height: 100%;
auto;
height: auto;
z-index: -1;
-webkit-filter:grayscale(100%);
}
</style>
</head>
<body>
<div id="div">
<video id="video" muted src="VID.mp4" autoplay loop>您的浏览器不支持< video>元素</video>
</div>
<<script>
var video= document.getElementById('video');
video.playbackRate = 0.5;
</script>
</body>
</html>