JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>baba</title>
  
  
  
      <link rel="stylesheet" href="css/style.css">

  
</head>

<body>
  //<video poster="baba.png" id="bgvid" playsinline>//
<source src="http://grochtdreis.de/fuer-jsfiddle/video/sintel_trailer-480.mp4" type="video/webm">
<source src="http://grochtdreis.de/fuer-jsfiddle/video/sintel_trailer-480.mp4" type="video/mp4">
</video>
<div id="baba">
<h3 align="center">baba</br></h3>

<button>O Y N A T</button>
</div>
  <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>

    <script  src="js/index.js"></script>

</body>
</html>

CSS

body {
  margin: 0;
  background: #000; 
}
video { 
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -100;
    -webkit-transform: translateX(-50%) translateY(-50%);
            transform: translateX(-50%) translateY(-50%);
 background: url('//baba.png') no-repeat;
  background-size: cover;
  -webkit-transition: 1s opacity;
  transition: 1s opacity;
}
.stopfade { 
   opacity: .5;
}

#baba { 
  font-family: Agenda-Light, Agenda Light, Agenda, Arial Narrow, sans-serif;
  font-weight:100; 
  background: rgba(0,0,0,0.3);
  color: white;
  padding: 2rem;
  width: 20%;
  margin:2rem;
  float: right;
  font-size: 1.2rem;
}
h1 {
  font-size: 3rem;
  text-transform: uppercase;
  margin-top: 0;
  letter-spacing: .3rem;
}
#baba button { 
  display: block;
  width: 80%;
  padding: .4rem;
  border: none; 
  margin: 1rem auto; 
  font-size: 1.3rem;
  background: rgba(255,255,255,0.23);
  color: #fff;
  border-radius: 3px; 
  cursor: pointer;
  -webkit-transition: .3s background;
  transition: .3s background;
}
#baba button:hover { 
   background: rgba(0,0,0,0.5);
}

a {
  display: inline-block;
  color: #fff;
  text-decoration: none;
  background:rgba(0,0,0,0.5);
  padding: .5rem;
  -webkit-transition: .6s background;
  transition: .6s background; 
}
a:hover{
  background:rgba(0,0,0,0.9);
}
@media screen and (max-width: 500px) { 
  div{width:70%;} 
}
@media screen and (max-device-width: 800px) {
  html { background: url(baba.png) #000 no-repeat center center fixed; }
  #bgvid { display: none; }
}

JavaScript

var vid = document.getElementById("bgvid");
var pauseButton = document.querySelector("#baba button");

if (window.matchMedia('(prefers-reduced-motion)').matches) {
  vid.removeAttribute("autoplay");
  vid.pause();
  pauseButton.innerHTML = "D U R D U R";
}

function vidFade() {
  vid.classList.add("stopfade");
}

vid.addEventListener('ended', function() {
  vid.pause();
});


pauseButton.addEventListener("click", function() {
  vid.classList.toggle("stopfade");
  if (vid.paused) {
    vid.play();
    pauseButton.innerHTML = "D U R D U R";
  } else {
    vid.pause();
	vidFade();
    pauseButton.innerHTML = "O Y N A T";
  }
})