Create MLButton.user.js

MLButton.user.js

@@ -0,0 +1,42 @@
+// ==UserScript==
+// @name         MonsterLyrics button
+// @namespace    https://github.com/NorbiPeti/LINK
+// @version      0.1
+// @description  Creates a button that searches for a lyrics video!
+// @author       NorbiPeti
+// @match        https://www.youtube.com/
+// @include      http://www.youtube.com/watch
+// @include      https://www.youtube.com/watch*
+// @grant        none
+// ==/UserScript==
+
+window.lasturl="";
+
+function AddIfChanged()
+{
+    if(window.location.href==window.lasturl)
+        return;
+    var cont=document.getElementById("watch7-subscription-container");
+    if(cont===null)
+        return;
+    cont.innerHTML+="<button type=\"button\" onClick=\"window.showLyrics()\" class=\"yt-uix-button yt-uix-button-size-default yt-uix-button-default\">Show lyrics</button>";
+    window.lasturl=window.location.href;
+}
+
+(function() {
+    'use strict';
+
+    // Your code here...
+    var namecont=document.getElementById("watch7-user-header");
+    if(namecont.innerHTML.indexOf("Monstercat")==-1)
+        return;
+    AddIfChanged();
+    window.setTimeout(AddIfChanged, 1000);
+})();
+
+window.showLyrics=function()
+{
+    var title=document.getElementById("eow-title").title;
+    title=encodeURI(title.replace(/\[[^\[\]]+\]/g, "")).replace("&", ""); //Tested on: Pegboard Nerds & NGHTMRE - Superstar (ft. Krewella)
+    window.location.href="https://www.youtube.com/user/monstercatmedialyric/search?query="+title;
+};