dynamically add mp4 video from data-src to src

gistfile1.txt

	//html
  <video muted loop data-src="vid/packaging.mp4" id="internalbannervideo">
		<source src="" type="video/mp4">
	</video>


//js
function swapVidSource() {
	var vidplayer = document.getElementById("internalbannervideo");
	var thedata = vidplayer.getAttribute('data-src');
   vidplayer.src = thedata;
   vidplayer.play();
}