Untitled

<body onload="myNewSrc()">
    <div class="video-wrapper-main">
       <video onended="myAddListener()" class="episodeVideo" preload="auto"
       autoplay controls>
         <source src="" type="video/mp4">
      </video>
    </div>
</body>

var currentIndex = 0;
// listener function changes src
function myNewSrc() {
  var myVideo = document.getElementsByClassName('episodeVideo')[0];
  myVideo.src = videoSources[currentIndex];
  myVideo.load();
}

// add a listener function to the ended event
function myAddListener() {
  var myVideo = document.getElementsByClassName('episodeVideo')[0];
  currentIndex = (currentIndex + 1) % videoSources.length;
  myVideo.src = videoSources[currentIndex];
  myVideo.addEventListener('ended', myNewSrc, false);

}