JSFiddle - React, Tailwind, and code Playground

HTML

<a href="http://www.youtube.com/watch?v=hYVGKdop63Y?fs=1&amp;width=640&amp;height=480&amp;hl=en_US1&amp;iframe=true&amp;rel=0">Kendra Grittani on stage at Koerner Hall (broken)</a>
<br/>

<a class="colorbox-load" href="http://www.youtube.com/watch?v=hYVGKdop63Y?fs=1&amp;width=640&amp;height=480&amp;hl=en_US1&amp;iframe=true&amp;rel=0">Kendra Grittani on stage at Koerner Hall (broken)</a>

JavaScript

$(document).ready(function() {

    $("a.colorbox-load").each(function(){
      var newUrl = $(this).attr('href').replace('youtube.com/watch?v=', 'youtube.com/v/');
      $(this).attr('href', newUrl);
    });
                  
});