JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div class="wrapper">
        <div class="header">
            <nav> <a href="http://braaasil.com/mysite/indexVideo.html">Video</a>  <a href="cnn.com/">Blog</a>  <a href="/js/">Glob</a>  <a href="/jquery/">Lgob</a>
 <a href="/jquery/">Contact</a>

            </nav>
        </div>
        <div class="out-video">
            <div id="video-viewport">
                <video autoPlay controls preload width="640" height="360">
                    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.mp4" type="video/mp4" />
                    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.webm" type="video/webm" />
                </video>
            </div>
            <div class="main_text"></div>
        </div>
    </div>

CSS

@charset"utf-8";
 * {
    margin: 0;
    padding: 0;
}
/* CSS Document */
 html, body {
    width:100%;
    height:100%
}
.wrapper {
    width:100%;
    height:100%;
}
.out {
    position:relative;
    background-image: url(../images/melissa.JPG);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    height:100%;
    width:100%;
    color:red;
}
.out-video {
    position: relative;
    min-width:100% !important;
    height:82% !important;
    z-index: -1;
    margin:0;
    padding:0;
    overflow: hidden;
}
.header {
    height:15%;
    position:relative;
    background-color:black;
    border-bottom:solid;
    border-bottom-width:10px;
    border-bottom-color:#777
}
button {
    position: relative;
    left:75%;
    top:15%;
}
nav {
    position:absolute;
    bottom:0;
    left:15%
}
nav a {
    font-variant:small-caps;
    font-size:24px;
    font-weight:bold;
    padding:10px;
    text-decoration:none;
    color:white;
    position:relative;
}
.main_text {
    color: white;
    font-size:76px;
    font-variant:small-caps;
    position:absolute;
    right:15%;
    top:30%;
}
video#bgvid {
    position: relative;
    z-index: 0;
    background: url(mel.jpg) no-repeat;
    background-size: 100% 100%;
    top: 0px;
    left: 50%;
    margin-left: -50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
}
#video-viewport {
    position: absolute;
    top: 0;
    overflow: hidden;
    z-index: -1; /* for accessing the video by click */
}

#debug {
    position: absolute;
    top 0;
    z-index: 100;
    color: #fff;
    font-size: 12pt;
}

JavaScript

var min_w = 300; // minimum video width allowed
var vid_w_orig;  // original video dimensions
var vid_h_orig;

jQuery(function() { // runs after DOM has loaded
    
    vid_w_orig = parseInt(jQuery('video').attr('width'));
    vid_h_orig = parseInt(jQuery('video').attr('height'));
    $('#debug').append("<p>DOM loaded</p>");
    
    jQuery(window).resize(function () { resizeToCover(); });
    jQuery(window).trigger('resize');
});

function resizeToCover() {
    // set the video viewport to the window size
    jQuery('#video-viewport').width(jQuery(window).width());
    jQuery('#video-viewport').height(jQuery(window).height());

    // use largest scale factor of horizontal/vertical
    var scale_h = jQuery(window).width() / vid_w_orig;
    var scale_v = jQuery(window).height() / vid_h_orig;
    var scale = scale_h > scale_v ? scale_h : scale_v;

    // don't allow scaled width < minimum video width
    if (scale * vid_w_orig < min_w) {scale = min_w / vid_w_orig;};

    // now scale the video
    jQuery('video').width(scale * vid_w_orig);
    jQuery('video').height(scale * vid_h_orig);
    // and center it by scrolling the video viewport
    jQuery('#video-viewport').scrollLeft((jQuery('video').width() - jQuery(window).width()) / 2);
    jQuery('#video-viewport').scrollTop((jQuery('video').height() - jQuery(window).height()) / 2);
 };