JSFiddle - React, Tailwind, and code Playground

HTML

<div id="tabs2">
    <div>
    <img class='thumb' src='http://i2.cdnds.net/11/34/odd_alan_partridge_bio_cover.jpg'>
    <iframe id="frame1" width="640" height="390" frameborder="0" title="YouTube video player"type="text/html"src="http://www.youtube.com/embed/u1zgFlCw8Aw?enablejsapi=1"></iframe>
    </div>
    
    <div>
        <img class='thumb' src='http://i2.cdnds.net/11/34/odd_alan_partridge_bio_cover.jpg'>
   <iframe id="frame2" width="640" height="390" frameborder="0" title="YouTube video player"type="text/html"src="http://www.youtube.com/embed/u1zgFlCw8Aw?enablejsapi=1"></iframe>
    </div>
</div>

CSS

#tabs2 div {
    position: relative;
}
/* For security reasons, an element cannor be placed over a frame */
/*.thumb {
    position: absolute;
}*/

.play {
    border: 3px solid red;
}

JavaScript

function getFrameID(id) {
    var elem = document.getElementById(id);
    if (elem) {
        if (/^iframe$/i.test(elem.tagName)){
        	console.log(id);
          return id;
        }  //Frame, OK
        // else: Look for frame
        var elems = elem.getElementsByTagName("iframe");
        if (!elems.length) return null; //No iframe found, FAILURE
        for (var i = 0; i < elems.length; i++) {
            if (/^https?:\/\/(?:www\.)?youtube(?:-nocookie)?\.com(\/|$)/i.test(elems[i].src)) break;
        }
        elem = elems[i]; //The only, or the best iFrame
        if (elem.id){
        	return elem.id;
        }  //Existing ID, return it
        // else: Create a new ID
        do { //Keep postfixing `-frame` until the ID is unique
            id += "-frame";
        } while (document.getElementById(id));
        elem.id = id;
        return id;
    }
    // If no element, return null.
    return null;
}

// Define YT_ready function.
var YT_ready = (function() {
    var onReady_funcs = [],
        api_isReady = false;
/* @param func function     Function to execute on ready
         * @param func Boolean      If true, all qeued functions are executed
         * @param b_before Boolean  If true, the func will added to the first
                                     position in the queue*/
    return function(func, b_before) {
        if (func === true) {
            api_isReady = true;
            for (var i = 0; i < onReady_funcs.length; i++) {
                // Removes the first func from the array, and execute func
                onReady_funcs.shift()();
            }
        }
        else if (typeof func == "function") {
            if (api_isReady) func();
            else onReady_funcs[b_before ? "unshift" : "push"](func);
        }
    }
})();
// This function will be called when the API is fully loaded

function onYouTubePlayerAPIReady() {
    YT_ready(true)
}

var players = {};
//Define a player storage object, to enable later function...