JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://www.youtube.com/player_api"></script>
<div id="player"></div>

JavaScript

// YouTube API
player = new YT.Player('player', {
    height: '240',
    width: '426',
    videoId: '21eGxOKUxeM',        
    events: {      
      'onStateChange': onPlayerStateChange
    }
  });

function onPlayerStateChange(state) {
    alert('state changed');           
    if (state == 1 ) {
        alert('playing...');
    }    
}