<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<div class="row">
<h2>Video autoplay</h2>
<video width="320" height="240" controls autoplay muted id="videos">
<source src="https://www.w3schools.com/tags/movie.mp4" type="video/mp4" >
<source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>
<p><strong>Note:</strong> The video tag is not supported in Internet Explorer 8 and earlier versions.</p>
</div>
</div>
$( document ).ready(function() {
// $('video:in-viewport').prop('muted', false);
var vid = document.getElementById("videos");
console.log(vid.muted);
vid.muted = false;
console.log(vid.muted);
});