JSFiddle - React, Tailwind, and code Playground

HTML

<div class="yturl">http://www.youtube.com/watch?v=UNMLEZrukRU</div>

JavaScript

$("div.yturl").each(function(){
                var regex = /(\?v=|\&v=|\/\d\/|\/embed\/|\/v\/|\.be\/)([a-zA-Z0-9\-\_]+)/;
                var youtubeurl = $(this).text();
                var regexyoutubeurl = youtubeurl.match(regex);
                if (regexyoutubeurl) {
                    $(this).html("<iframe width=\"390\" height=\"315\" src=\"http://www.youtube.com/embed/"+regexyoutubeurl[2]+"\" frameborder=\"0\" allowfullscreen></iframe>");
                }
            });