---------------------------------------- <form> <input type="text" id="yturl" value="UCn-K7GIs62ENvdQe6ZZk9-w" /> <input type="button" id="btn" value="ChannelPlayListURL" /> </form> <script> document.getElementById('btn').onclick = function() { var val = document.getElementById('yturl').value; val = val.replace('UC', 'UU'); var url = "https://www.youtube.com/embed/videoseries?list=" + val; var a = document.createElement('a'); var linkText = document.createTextNode(url); a.appendChild(linkText); a.title = "yturl"; a.target = '_blank'; a.href = url; a.style.display = 'block'; document.body.appendChild(a); } </script> </plaintext>