Responsive HTML5 Video Background in DIV

Example of how to implement a HTML5 video as a background in an element. Includes JS to resize Element proportionately. Uses modernizr to provide image fallback for touch devices and browsers that do not support video. Example built with Bootstrap.

by Thanos Saringelos

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.7.1/modernizr.min.js"></script>
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                <span class="sr-only">Toggle navigation</span>
	            <span class="icon-bar"></span>
	            <span class="icon-bar"></span>
	            <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="#">Company Name</a>
        </div>
        <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav pull-right">
                <li class="active"><a href="#">Services</a>
                </li>
                <li class="active"><a href="#">Sectors</a>
                </li>
                <li class="active"><a href="#">News</a>
                </li>
                <li class="active"><a href="#">About Us</a>
                </li>
                <li class="active"><a href="#">Contact Us</a>
                </li>
            </ul>
        </div>
        <!--/.navbar-collapse -->
    </div>
</div>
<!-- Main jumbotron for a primary marketing message or call to action -->
<div class="homepage-hero-module">
    <div class="video-container">
        <div class="title-container">
            <div class="headline">
                	<h1>Welcome to our Company</h1>

            </div>
            <div class="description">
                <div class="inner">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s</div>
            </div>
        </div>
        <div class="filter"></div>
        <video autoplay loop class="fillWidth">
            <source...

CSS

.homepage-hero-module {
  border-right: none;
  border-left: none;
  position: relative;
}
.no-video .video-container video,
.touch .video-container video {
  display: none;
}
.no-video .video-container .poster,
.touch .video-container .poster {
  display: block !important;
}
.video-container {
  position: relative;
  bottom: 0%;
  left: 0%;
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: #000;
}
.video-container .poster img {
  width: 100%;
  bottom: 0;
  position: absolute;
}
.video-container .filter {
  z-index: 100;
  position: absolute;
  background: rgba(0, 0, 0, 0.4);
  width: 100%;
}
.video-container .title-container {
  z-index: 1000;
  position: absolute;
  top: 35%;
  width: 100%;
  text-align: center;
  color: #fff;
}
.video-container .description .inner {
  font-size: 1em;
  width: 45%;
  margin: 0 auto;
}
.video-container .link {
  position: absolute;
  bottom: 3em;
  width: 100%;
  text-align: center;
  z-index: 1001;
  font-size: 2em;
  color: #fff;
}
.video-container .link a {
  color: #fff;
}
.video-container video {
  position: absolute;
  z-index: 0;
  bottom: 0;
}
.video-container video.fillWidth {
  width: 100%;
}

JavaScript

/** Document Ready Functions **/
/********************************************************************/

$( document ).ready(function() {

    // Resive video
    scaleVideoContainer();

    initBannerVideoSize('.video-container .poster img');
    initBannerVideoSize('.video-container .filter');
    initBannerVideoSize('.video-container video');
        
    $(window).on('resize', function() {
        scaleVideoContainer();
        scaleBannerVideoSize('.video-container .poster img');
        scaleBannerVideoSize('.video-container .filter');
        scaleBannerVideoSize('.video-container video');
    });

});

/** Reusable Functions **/
/********************************************************************/

function scaleVideoContainer() {

    var height = $(window).height();
    var unitHeight = parseInt(height) + 'px';
    $('.homepage-hero-module').css('height',unitHeight);

}

function initBannerVideoSize(element){
    
    $(element).each(function(){
        $(this).data('height', $(this).height());
        $(this).data('width', $(this).width());
    });

    scaleBannerVideoSize(element);

}

function scaleBannerVideoSize(element){

    var windowWidth = $(window).width(),
        windowHeight = $(window).height(),
        videoWidth,
        videoHeight;
    
    console.log(windowHeight);

    $(element).each(function(){
        var videoAspectRatio = $(this).data('height')/$(this).data('width'),
            windowAspectRatio = windowHeight/windowWidth;

        if (videoAspectRatio > windowAspectRatio) {
            videoWidth = windowWidth;
            videoHeight = videoWidth * videoAspectRatio;
            $(this).css({'top' : -(videoHeight - windowHeight) / 2 + 'px', 'margin-left' : 0});
        } else {
            videoHeight = windowHeight;
            videoWidth = videoHeight / videoAspectRatio;
            $(this).css({'margin-top' : 0, 'margin-left' : -(videoWidth - windowWidth) / 2 + 'px'});
        }

       ...