我想放置一个html5视频(当然还有视频标签)100%宽度和100%高度,它将在后台播放.这是一个图像的例子,我想要一个视频完全相同,我只是没有找到如何做到这一点:

#image {
    background-image: url("image.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
}

JSFiddle:http://jsfiddle.net/u9ncpyfu/

你可以尝试:

header {
    position: relative;
    background-size: cover;
    background-position: 50% 50%;
    height: 100vh;
    z-index: 0;
}
header h1 {
    text-align: center;
    font: 3em/1.4 helvetica neue, helvetica, arial, sans-serif;
    color: #fff
}
header video {
    -webkit-transform: translateX(-50%) translateY(-50%);
    -moz-transform: translateX(-50%) translateY(-50%);
    -ms-transform: translateX(-50%) translateY(-50%);
    -o-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%);
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -100;
}

    
Sample Title
	

#video {
    position: fixed;
    left: 0;
    top: 0;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
}

#video-wrap {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
#video {
    position: absolute;
    top: -9999px;
    bottom: -9999px;
    left: -9999px;
    right: -9999px;
    margin: auto;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;   
}