TwitchHtml5Greasemonkey

// ==UserScript==
// @name         Twitch.tv Full HTML5 Player
// @version      1.2.1
// @description  Twitch.tv Full HTML5 Player
// @author       Devrim
// @match        http://twitch.tv/*
// @match        http://*.twitch.tv/*
// @run-at       document-end
// @grant        none
// ==/UserScript==

setTimeout(function() {
    $(".js-player").html(
        $("<iframe>").attr({
            "src": "http://player.twitch.tv/?branding=false&html5&showInfo=false&channel=" + $(location).attr('pathname'),
            "width": "100%",
            "height": "100%",
            "allowfullscreen": true,
            "webkitallowfullscreen": true,
            "mozallowfullscreen": true
        }).css(
            "border", 0
        )
    );
    $(".player-overlay").hide();
    $(".player-loading").hide();
},5000);