My Javascript project is accessing the webcam but nothing is displaying

http://stackoverflow.com/questions/36603694/my-javascript-project-is-accessing-the-webcam-but-nothing-is-displaying

by Brian Kueck

HTML

<div id="camDiv">
  <video autoplay id="camVideo"></video>
</div>

JavaScript

var camvideo = document.querySelector('#camVideo');
console.log(camvideo);

navigator.getUserMedia = navigator.getUserMedia
        ||navigator.webkitGetUserMedia//Chrome;
        ||navigator.mozGetUserMedia//Firefox
        ||navigator.msGetUserMedia//IE
        ||navigator.oGetUserMedia;//Safari

if(navigator.getUserMedia){
    navigator.getUserMedia({video:true}, 
        function(stream){camvideo.src = window.URL.createObjectURL(stream);},
        function(){alert('error');});     
}