code:

const iframe = document.createElement("script");
iframe.type = "text/javascript";
iframe.src = "https://www.youtube.com/iframe_api";
iframe.async = true;

const yt = document.createElement("script");
yt.type = "text/javascript";
yt.src="https://cdn.rawgit.com/labnol/files/master/yt.js";
yt.async = true;

document.head.appendChild(iframe);
document.head.appendChild(yt);

const video = document.createElement('div');
video.setAttribute('data-video', 'kWVFEVWJMz8');
video.setAttribute('data-autoplay', 1);
video.setAttribute('data-loop', 1);
video.setAttribute('id', "youtube-audio");

document.body.appendChild(video);