diff -r 000000000000 -r 6474c204b198 b2g/components/YoutubeProtocolHandler.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/components/YoutubeProtocolHandler.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+XPCOMUtils.defineLazyGetter(this, "cpmm", function() {
+  return Cc["@mozilla.org/childprocessmessagemanager;1"]
+           .getService(Ci.nsIMessageSender);
+});
+
+function YoutubeProtocolHandler() {
+}
+
+YoutubeProtocolHandler.prototype = {
+  classID: Components.ID("{c3f1b945-7e71-49c8-95c7-5ae9cc9e2bad}"),
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIProtocolHandler]),
+
+  scheme: "vnd.youtube",
+  defaultPort: -1,
+  protocolFlags: Ci.nsIProtocolHandler.URI_NORELATIVE |
+                 Ci.nsIProtocolHandler.URI_NOAUTH |
+                 Ci.nsIProtocolHandler.URI_LOADABLE_BY_ANYONE,
+
+  // Sample URL:
+  // vnd.youtube:iNuKL2Gy_QM?vndapp=youtube_mobile&vndclient=mv-google&vndel=watch&vnddnc=1
+  // Note that there is no hostname, so we use URLTYPE_NO_AUTHORITY
+  newURI: function yt_phNewURI(aSpec, aOriginCharset, aBaseURI) {
+    let uri = Cc["@mozilla.org/network/standard-url;1"]
+              .createInstance(Ci.nsIStandardURL);
+    uri.init(Ci.nsIStandardURL.URLTYPE_NO_AUTHORITY, this.defaultPort,
+             aSpec, aOriginCharset, aBaseURI);
+    return uri.QueryInterface(Ci.nsIURI);
+  },
+
+  newChannel: function yt_phNewChannel(aURI) {
+    /*
+     * This isn't a real protocol handler. Instead of creating a channel
+     * we just send a message and throw an exception. This 'content-handler'
+     * message is handled in b2g/chrome/content/shell.js where it starts
+     * an activity request that will open the Video app. The video app
+     * includes code to handle this fake 'video/youtube' mime type
+     */
+    cpmm.sendAsyncMessage("content-handler", {
+      type: 'video/youtube', // A fake MIME type for the activity handler
+      url: aURI.spec         // The path component of this URL is the video id
+    });
+
+    throw Components.results.NS_ERROR_ILLEGAL_VALUE;
+  },
+
+  allowPort: function yt_phAllowPort(aPort, aScheme) {
+    return false;
+  }
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([YoutubeProtocolHandler]);