diff --git a/bower.json b/bower.json
index 2c5a4004..ef1064bc 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "webshim",
-  "version": "1.15.0-RC1",
+  "version": "1.15.0-RC2",
   "homepage": "https://github.com/aFarkas/webshim",
   "authors": [
     "aFarkas <info@corrupt-system.de>"
@@ -24,7 +24,8 @@
     "canvas",
     "HTML5",
     "UI",
-    "geolocation"
+    "geolocation",
+	"getUserMedia"
   ],
   "license": "MIT",
   "ignore": [
diff --git a/changelog.md b/changelog.md
index badff83f..ef882804 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,14 @@
+upcomming Release 1.15.0
+----------
+
+- implemented ``getUserMedia`` feature ([demo](http://jsfiddle.net/trixta/yC2j3/embedded/result/))
+- fixed data-grouprequired bug
+- improved youtube iframe lazy loading
+- added ``canvas.toBlob`` in browsers without native FormData (to be used with FormData/FileReader shim)
+- improved loading of xhr2/filereader feature
+- update es6-shim
+- improved youtube play bug on iOS and Android browsers
+
 Release 1.14.6
 ----------
 
diff --git a/demos/demos/forms.html b/demos/demos/forms.html
index 0cbc886f..c6462c76 100644
--- a/demos/demos/forms.html
+++ b/demos/demos/forms.html
@@ -32,7 +32,7 @@
 
 		<div id="sidebar" class="interface">
 
-			<a class="toc_title" href="../index.html"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC1</span>)</span></a>
+			<a class="toc_title" href="../index.html"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC2</span>)</span></a>
 			<ul class="toc_section">
 				<li>
 					&raquo; <a href="https://github.com/aFarkas/webshim">GitHub Repository</a>
diff --git a/demos/demos/mediaelement.html b/demos/demos/mediaelement.html
index ab019deb..5f5bc4f3 100644
--- a/demos/demos/mediaelement.html
+++ b/demos/demos/mediaelement.html
@@ -112,7 +112,7 @@
 
 		<div id="sidebar" class="interface">
 
-			<a class="toc_title" href="../index.html"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC1</span>)</span></a>
+			<a class="toc_title" href="../index.html"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC2</span>)</span></a>
 			<ul class="toc_section">
 				<li>
 					&raquo; <a href="https://github.com/aFarkas/webshim">GitHub Repository</a>
diff --git a/demos/index.html b/demos/index.html
index 021c002a..3722525e 100644
--- a/demos/index.html
+++ b/demos/index.html
@@ -28,7 +28,7 @@
 
 		<div id="sidebar" class="interface">
 
-			<a class="toc_title"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC1</span>)</span></a>
+			<a class="toc_title"> Webshim <span class="version">(<span class="ws-version">1.15.0-RC2</span>)</span></a>
 			<ul class="toc_section">
 				<li>
 					&raquo; <a href="https://github.com/aFarkas/webshim">GitHub Repository</a>
@@ -101,6 +101,7 @@
 			<a class="toc_title" href="#Promise"> Promise </a>
 
 			<a class="toc_title" href="#url"> URL </a>
+			<a class="toc_title" href="#usermedia"> usermedia (getUserMedia </a>
 
 			<a class="toc_title" href="#Picturefill"> Responsive Images (<code>picture</code>, <code>srcset</code>)</a>
 
@@ -143,7 +144,7 @@
 			<h3 id="downloads">Downloads &amp; Dependencies</h3>
 			<span style="padding-left: 7px; font-size:11px; font-weight: normal;" class="interface">(Right-click, and use "Save As")</span>
 			<p>
-				<a href="https://github.com/aFarkas/webshim/archive/1.15.0-RC1.zip" class="download-button"> <strong><i>Download</i></strong> </a>
+				<a href="https://github.com/aFarkas/webshim/archive/1.15.0-RC2.zip" class="download-button"> <strong><i>Download</i></strong> </a>
 			</p>
 
 			<p>
@@ -233,6 +234,9 @@ <h3 id="Guide-configuration">Configuration</h3>
 					<li>
 						url (<a href="http://url.spec.whatwg.org">window.URL</a>)
 					</li>
+					<li>
+						usermedia (navigator.getUserMedia)
+					</li>
 
 					<li>
 						track (subtitles, catptions and textTrack API)
@@ -1645,6 +1649,16 @@ <h2 id="matchMedia">matchMedia</h2>
 					<a href="https://github.com/paulirish/matchMedia.js" target="_external">https://github.com/paulirish/matchMedia.js</a>.</em>
 			</p>
 
+
+			<h2 id="usermedia">usermedia</h2>
+			<p>
+				The <code class="i">usermedia</code> feature is a polyfill of
+				<a href="https://developer.mozilla.org/en-US/docs/NavigatorUserMedia.getUserMedia" target="_external">navigator.getUserMedia</a>.  It includes also a polyfill for <code>URL</code> and the <code>srcObj</code> property.
+			</p>
+			<p>
+				A demo with <a href="http://jsfiddle.net/trixta/yC2j3/embedded/result/" target="_external">code example of getUserMedia polyfill</a>.
+			</p>
+
 			<h2 id="url">url</h2>
 			<p>
 				The <code class="i">url</code> feature is a polyfill of
diff --git a/js-webshim/dev/polyfiller.js b/js-webshim/dev/polyfiller.js
index 1862965d..3aa2d4bc 100644
--- a/js-webshim/dev/polyfiller.js
+++ b/js-webshim/dev/polyfiller.js
@@ -127,7 +127,7 @@
 	}
 
 	$.extend(webshims, {
-		version: '1.15.0-RC1',
+		version: '1.15.0-RC2',
 
 		cfg: {
 			enhanceAuto: window.Audio && (!window.matchMedia || matchMedia('(min-device-width: 721px)').matches),
diff --git a/js-webshim/dev/shims/combos/comboinfo.json b/js-webshim/dev/shims/combos/comboinfo.json
index ecca2ce9..6b7c8e84 100644
--- a/js-webshim/dev/shims/combos/comboinfo.json
+++ b/js-webshim/dev/shims/combos/comboinfo.json
@@ -1 +1 @@
-{"version":"1.15.0-RC1","features":{"swfmini":[16,7,2,8,1,12,23],"dom-support":[16,7,2,8,15,30,3,4,9,10,25,31,34],"forms":[16,7,2,8,1,15,30,3,4,9,31,6,5,14,29,28,27,33],"mediaelement":[16,7,2,8,1,12,23,25,21,13],"track":[12,34,21,22,13],"range-ui":[9,10,6,5,17,11],"forms-ext":[9,10,6,5,14,29,28,17,33,11],"filereader":[25,27],"picture":[18],"matchMedia":[18],"geolocation":[21],"details":[21,22],"jmebase":[98,99,97],"mediacontrols":[98,99],"playlist":[98,97]},"files":{"src/shims/combos/16.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/7.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/2.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/8.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/mediaelement-core.js"],"src/shims/combos/1.js":["src/shims/swfmini.js","src/shims/form-core.js","src/shims/mediaelement-core.js"],"src/shims/combos/12.js":["src/shims/swfmini.js","src/shims/mediaelement-core.js","src/shims/track.js"],"src/shims/combos/23.js":["src/shims/swfmini.js","src/shims/mediaelement-core.js"],"src/shims/combos/15.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-datalist.js"],"src/shims/combos/30.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/form-datalist.js"],"src/shims/combos/3.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js"],"src/shims/combos/4.js":["src/shims/dom-extend.js","src/shims/form-message.js"],"src/shims/combos/9.js":["src/shims/dom-extend.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js","src/shims/form-datalist.js"],"src/shims/combos/10.js":["src/shims/dom-extend.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/25.js":["src/shims/dom-extend.js","src/shims/filereader.js","src/shims/mediaelement-jaris.js"],"src/shims/combos/31.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-datalist.js"],"src/shims/combos/34.js":["src/shims/dom-extend.js","src/shims/track.js"],"src/shims/combos/18.js":["src/shims/picture.js","src/shims/matchMedia.js"],"src/shims/combos/21.js":["src/shims/geolocation.js","src/shims/details.js","src/shims/mediaelement-jaris.js","src/shims/track.js"],"src/shims/combos/6.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js","src/shims/form-datalist.js"],"src/shims/combos/5.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/14.js":["src/shims/form-native-extend.js","src/shims/form-message.js","src/shims/form-number-date-api.js"],"src/shims/combos/29.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js"],"src/shims/combos/28.js":["src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-number-date-api.js","src/shims/form-datalist.js"],"src/shims/combos/27.js":["src/shims/form-shim-extend2.js","src/shims/filereader.js"],"src/shims/combos/17.js":["src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/33.js":["src/shims/form-number-date-api.js","src/shims/form-datalist.js"],"src/shims/combos/11.js":["src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/22.js":["src/shims/details.js","src/shims/track.js"],"src/shims/combos/13.js":["src/shims/mediaelement-core.js","src/shims/track.js"],"src/shims/combos/98.js":["src/shims/jme/base.js","src/shims/jme/mediacontrols.js","src/shims/jme/playlist.js"],"src/shims/combos/99.js":["src/shims/jme/base.js","src/shims/jme/mediacontrols.js"],"src/shims/combos/97.js":["src/shims/jme/base.js","src/shims/jme/playlist.js"]}}
\ No newline at end of file
+{"version":"1.15.0-RC2","features":{"swfmini":[16,7,2,8,1,12,23],"dom-support":[16,7,2,8,15,30,3,4,9,10,25,31,34],"forms":[16,7,2,8,1,15,30,3,4,9,31,6,5,14,29,28,27,33],"mediaelement":[16,7,2,8,1,12,23,25,21,13],"track":[12,34,21,22,13],"range-ui":[9,10,6,5,17,11],"forms-ext":[9,10,6,5,14,29,28,17,33,11],"filereader":[25,27],"picture":[18],"matchMedia":[18],"geolocation":[21],"details":[21,22],"jmebase":[98,99,97],"mediacontrols":[98,99],"playlist":[98,97]},"files":{"src/shims/combos/16.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/7.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/2.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-datalist.js","src/shims/mediaelement-core.js"],"src/shims/combos/8.js":["src/shims/swfmini.js","src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/mediaelement-core.js"],"src/shims/combos/1.js":["src/shims/swfmini.js","src/shims/form-core.js","src/shims/mediaelement-core.js"],"src/shims/combos/12.js":["src/shims/swfmini.js","src/shims/mediaelement-core.js","src/shims/track.js"],"src/shims/combos/23.js":["src/shims/swfmini.js","src/shims/mediaelement-core.js"],"src/shims/combos/15.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-datalist.js"],"src/shims/combos/30.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js","src/shims/form-datalist.js"],"src/shims/combos/3.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-message.js"],"src/shims/combos/4.js":["src/shims/dom-extend.js","src/shims/form-message.js"],"src/shims/combos/9.js":["src/shims/dom-extend.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js","src/shims/form-datalist.js"],"src/shims/combos/10.js":["src/shims/dom-extend.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/25.js":["src/shims/dom-extend.js","src/shims/filereader.js","src/shims/mediaelement-jaris.js"],"src/shims/combos/31.js":["src/shims/dom-extend.js","src/shims/form-core.js","src/shims/form-datalist.js"],"src/shims/combos/34.js":["src/shims/dom-extend.js","src/shims/track.js"],"src/shims/combos/18.js":["src/shims/picture.js","src/shims/matchMedia.js"],"src/shims/combos/21.js":["src/shims/geolocation.js","src/shims/details.js","src/shims/mediaelement-jaris.js","src/shims/track.js"],"src/shims/combos/6.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js","src/shims/form-datalist.js"],"src/shims/combos/5.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/14.js":["src/shims/form-native-extend.js","src/shims/form-message.js","src/shims/form-number-date-api.js"],"src/shims/combos/29.js":["src/shims/form-native-extend.js","src/shims/form-number-date-api.js"],"src/shims/combos/28.js":["src/shims/form-shim-extend.js","src/shims/form-message.js","src/shims/form-number-date-api.js","src/shims/form-datalist.js"],"src/shims/combos/27.js":["src/shims/form-shim-extend2.js","src/shims/filereader.js"],"src/shims/combos/17.js":["src/shims/form-number-date-api.js","src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/33.js":["src/shims/form-number-date-api.js","src/shims/form-datalist.js"],"src/shims/combos/11.js":["src/shims/range-ui.js","src/shims/form-number-date-ui.js"],"src/shims/combos/22.js":["src/shims/details.js","src/shims/track.js"],"src/shims/combos/13.js":["src/shims/mediaelement-core.js","src/shims/track.js"],"src/shims/combos/98.js":["src/shims/jme/base.js","src/shims/jme/mediacontrols.js","src/shims/jme/playlist.js"],"src/shims/combos/99.js":["src/shims/jme/base.js","src/shims/jme/mediacontrols.js"],"src/shims/combos/97.js":["src/shims/jme/base.js","src/shims/jme/playlist.js"]}}
\ No newline at end of file
diff --git a/js-webshim/minified/polyfiller.js b/js-webshim/minified/polyfiller.js
index e692bb29..00b57c5e 100644
--- a/js-webshim/minified/polyfiller.js
+++ b/js-webshim/minified/polyfiller.js
@@ -1 +1 @@
-!function(a){var b=function(){window.asyncWebshims||(window.asyncWebshims={cfg:[],ready:[]})},c=function(){window.jQuery&&(a(jQuery),a=function(){return window.webshims})};window.webshims={setOptions:function(){b(),window.asyncWebshims.cfg.push(arguments)},ready:function(){b(),window.asyncWebshims.ready.push(arguments)},activeLang:function(a){b(),window.asyncWebshims.lang=a},polyfill:function(a){b(),window.asyncWebshims.polyfill=a},_curScript:function(){var a,b,c,d=document.currentScript;if(!d){try{throw new Error("")}catch(e){c=(e.sourceURL||e.stack||"").split("\n"),c=((c[c.length-1]||c[c.length-2]||"").match(/(?:fil|htt|wid|abo|app|res)(.)+/i)||[""])[0].replace(/[\:\s\(]+[\d\:\)\(\s]+$/,"")}for(a=document.scripts||document.getElementsByTagName("script"),b=0;b<a.length&&(!a[b].getAttribute("src")||(d=a[b],"interactive"!=a[b].readyState&&c!=a[b].src));b++);}return d}()},window.webshim=window.webshims,window.webshims.timer=setInterval(c,0),c(),"function"==typeof define&&define.amd&&define("polyfiller",["jquery"],a)}(function(a){"use strict";function b(a){return document.createElement(a)}var c,d,e=window.navigator,f=window.webshims,g="dom-support",h=a.event.special,i=a([]),j=window.asyncWebshims,k={},l=window.Object,m=function(a){return a+"\n//# sourceURL="+this.url},n=function(a){return p.enhanceAuto||"auto"!=a?a:!1},o={matchmedia:"matchMedia",xhr2:"filereader",promise:"es6",URL:"url"};clearInterval(f.timer),k.advancedObjectProperties=k.objectAccessor=k.ES5=!!("create"in l&&"seal"in l),!k.ES5||"toJSON"in Date.prototype||(k.ES5=!1),d=a.support.hrefNormalized===!1?f._curScript.getAttribute("src",4):f._curScript.src,d=d.split("?")[0].slice(0,d.lastIndexOf("/")+1)+"shims/",a.extend(f,{version:"1.15.0-RC1",cfg:{enhanceAuto:window.Audio&&(!window.matchMedia||matchMedia("(min-device-width: 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diff --git a/package.json b/package.json
index c46e25b3..fbafeb93 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "webshim",
-  "version": "1.15.0-RC1",
+  "version": "1.15.0-RC2",
   "title": "Webshims - polyfills jQuery with many HTML5 features",
   "licenses": [
     {
@@ -25,7 +25,8 @@
     "localstorage",
     "geolocation",
     "ui",
-    "widgets"
+    "widgets",
+	"getUserMedia"
   ],
   "homepage": "http://afarkas.github.com/webshim/demos/index.html",
   "description": "modular capability-based polyfill loading libary, which extends jQuery with HTML5 features in legacy browsers",
diff --git a/readme.md b/readme.md
index 8e6dd84f..6fb81e05 100644
--- a/readme.md
+++ b/readme.md
@@ -26,6 +26,7 @@ Features
 * geolocation
 * ECMAScript 5 / JavaScript 1.8.5 features
 * window.URL
+* getUserMedia ('usermedia' currently only access to user's camera, not microphone)
 
 
 Installation and Usage
diff --git a/src/polyfiller.js b/src/polyfiller.js
index 1862965d..3aa2d4bc 100644
--- a/src/polyfiller.js
+++ b/src/polyfiller.js
@@ -127,7 +127,7 @@
 	}
 
 	$.extend(webshims, {
-		version: '1.15.0-RC1',
+		version: '1.15.0-RC2',
 
 		cfg: {
 			enhanceAuto: window.Audio && (!window.matchMedia || matchMedia('(min-device-width: 721px)').matches),
diff --git a/webshims.jquery.json b/webshims.jquery.json
index fd2cc68a..ae489d43 100644
--- a/webshims.jquery.json
+++ b/webshims.jquery.json
@@ -1,6 +1,6 @@
 {
 	"name": "webshims",
-	"version": "1.15.0-RC1",
+	"version": "1.15.0-RC2",
 	"title": "Webshim - polyfills jQuery with many HTML5 features",
 	"licenses" : [
 		{
@@ -16,7 +16,7 @@
 		"url": "https://github.com/aFarkas/"
 	},
 	
-	"keywords": ["webshims", "polyfill", "HTML5", "forms", "FormData", "Promises", "Promise", "matchMedia", "responsive", "XHR2", "xhr2", "CORS", "cross-doamin", "file", "upload", "multiple", "progress", "AJAX", "form", "audio", "video", "validation", "formvalidation", "colorpicker", "input", "form", "slider", "canvas", "geolocation", "ui", "widgets", "datepicker", "timepicker", "slider", "range"],
+	"keywords": ["webshims", "polyfill", "HTML5", "forms", "FormData", "Promises", "Promise", "matchMedia", "responsive", "XHR2", "xhr2", "CORS", "cross-doamin", "file", "upload", "multiple", "progress", "AJAX", "form", "audio", "video", "validation", "formvalidation", "colorpicker", "input", "form", "slider", "canvas", "geolocation", "ui", "widgets", "datepicker", "timepicker", "slider", "range", "webshim", "getUserMedia", "usermedia", "camera"],
 	"homepage": "http://afarkas.github.io/webshim/demos/index.html",
 	"description": "modular capability-based polyfill loading libary, which extends jQuery with HTML5 features in legacy browsers",
 	"docs": "http://afarkas.github.io/webshim/demos/index.html",