Adding video source code to Muse

I can copy the embedding code for a YouTube video, but I want to include my own video from my computer.

I've added video to my page (screen) with Dreamweaver, and attempted to copy the code into Muse.

<div>

  <video width="750" height="500" id="Bilby" poster="Bilby.png" preload="auto" controls autoplay >

    <source src="Bilby.mp4" type="video/mp4">

    <width 750 px>

  </video>

</div>

Something happens when I view in browser, I get the controls and I'm told that it's loading, which it never does.

I've followed a previous discussion Adding Video Easliy (http://forums.adobe.com/message/4655099#4655099)

I've put in the javascript code into the head:

<link href="http://vjs.zencdn.net/c/video-js.css" rel="stylesheet">

<script src="http://vjs.zencdn.net/c/video.js"></script>

And on my page where I insert HTML, I insert the code:

<video id="my_video_1" class="video-js vjs-default-skin"

     controls preload="auto" width="640" height="264"

     poster="my_video_poster.png" data-setup="{}">

          <source src="my_video.mp4" type='video/mp4'>

          <source src="my_video.webm" type='video/webm'>

</video>

I get the skin and play button, but again, nothing loads.

Is it not possible to add video from your own computer and test by previewing in browser, using Muse?