JSFiddle - React, Tailwind, and code Playground

HTML

<a rel="IcF-OsJnkjk" id="video_link" onclick="open_video(this); return false;" href="#">Mostrar Video 1</a><br />
<a rel="n9AcG0glVu4" id="video_link" onclick="open_video(this); return false;" href="#">Mostrar Video 2</a><br />
<a rel="Zew6hGsFNXQ" id="video_link" onclick="open_video(this); return false;" href="#">Mostrar Video 3</a><br />

JavaScript

function open_video(a){
    a.innerHTML = '<iframe width="425" height="349" src="http://www.youtube.com/embed/'+a.rel+'?autoplay=1" frameborder="0" allowfullscreen></iframe>';
    a.onclick = null;
    a.href = null;
}