How can I not truncate my div with video player and bootstrap 3.0

How can I not truncate my div with video player and bootstrap 3.0

I'm using this template :
http://getbootstrap.com/examples/offcanvas/
When i put my S3 video player, in big size, it's ok like here :
But if i reduce the size of my page, i've got this:
My line code is :
<div class="jumbotron">
<p><strong>Module 1 :</strong> <a name="un">Introduction</a></p>
<script type="text/javascript">
<!-- Script for video S3 -->
</script>
<p>Description</p>
</div>
How can i keep the width of the div that contain my video with Bootstrap?