JSFiddle - React, Tailwind, and code Playground

HTML

<div id="popupVid" style="position:absolute;left:0px;top:87px;width:500px;background-color:#D05F27;height:auto;display:block;z-index:200;">
    <br/>
    
   <iframe width="500" height="315" src="//www.youtube.com/embed/-e9iT5_N378?enablejsapi=1" frameborder="0" allowfullscreen></iframe>
    
   <br /><br />
    
   <a href="javascript:;" onClick="videoCommand('pauseVideo');">Pauze</a>
    
       <a href="javascript:;" onClick="videoCommand('playVideo');">Play</a>
</div>

JavaScript

function videoCommand(command) {
    //console.log(command);
    var iframe = document.getElementById('popupVid').getElementsByTagName("iframe")[0].contentWindow;
    console.log(iframe.postMessage());
    iframe.postMessage('{"event":"command","func":"'+command+'","args":""}','*');
}