JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://www.youtube.com/player_api"></script>
<iframe id="player" type="text/html" width="200" height="150" src="http://www.youtube.com/embed/PjDw3azfZWI?enablejsapi=1" frameborder="0"></iframe>
<br />
<button type="button" onclick="seek(30)">Seek forward 30 seconds</button>

JavaScript

var player, seconds = 0;
function onYouTubeIframeAPIReady() {
    console.log("player");
    player = new YT.Player('player', {
        events: {
          'onReady': onPlayerReady
        }
      });
}

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


function seek(sec){
    if(player){
        seconds += sec;
        player.seekTo(seconds, true);
    }
}