you could load next clip in the onend event like that
<script type="text/javascript">
var nextVideo = "path/of/next/video.mp4";
var videoPlayer = document.getElementById('videoPlayer');
videoPlayer.onended = function(){
videoPlayer.src = nextVideo;
}
</script>
<video id="videoPlayer" src="https://stackoverflow.com/questions/2551859/path/of/current/video.mp4" autoplay autobuffer controls />
More information here