Raw Source
BskyB / Open YouTube videos in TV mode

// ==UserScript==
// @name        Open YouTube videos in TV mode
// @icon        http://i.imgur.com/vD67sda.jpg
// @namespace   http://OpenUserJS.org
// @author        BskyB
// @description opens youtube videos in TV(https://www.youtube.com/tv#/) mode. other pages like http://www.youtube.com/feed/subscriptions will open in their default desktop view. TV playback seem to be only avaliable to MSE compatible browsers like latest stable Chrome or Nightly Firefox
// @version	2014.05.14
// @include        https://www.youtube.com/watch*
// @exclude     https://www.youtube.com/tv#/watch*
// @downloadURL		https://openuserjs.org/install/bskyb/httpuserstyles.org/Open_YouTube_videos_in_TV_mode.user.js
// @updateURL		https://openuserjs.org/install/bskyb/httpuserstyles.org/Open_YouTube_videos_in_TV_mode.user.js
// @grant       GM_getValue
// @grant       GM_log
// @grant       GM_openInTab
// @grant       GM_registerMenuCommand
// @grant       GM_setValue
// @grant       GM_xmlhttpRequest
// @grant       GM_addStyle
// @run-at         document-start
// ==/UserScript==

//Redirect from standard Youtube to TV view
window.location.replace(window.location.href.replace("https://www.youtube.com/watch","https://www.youtube.com/tv#/watch"));