JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html> 
<html> 
<body> 
<a href="#" id="playvideo" onclick="playme()">Play video</a>
    <iframe id="video1" width="520" height="360"  frameborder="0" ></iframe>
<script>
function playme() {
document.getElementById("video1").src = 'http://www.w3schools.com/tags/mov_bbb.mp4';
}
</script>
</body> 
</html>