JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://www.youtube.com/iframe_api"></script>

<div id="player"></div>

JavaScript

var onPlayerReady = function(event) {
      event.target.playVideo();  
};

// The first argument of YT.Player is an HTML element ID. YouTube API will replace my <div id="player"> tag with an iframe containing the youtube video.
var player = new YT.Player('player', {
    height: 320,
    width: 400,
    videoId : '6Dc1C77nra4',
    events : {
        'onReady' : onPlayerReady
    }
 });