Issue 4708 - fix full screen unavailable notification

includes/index.tmpl

 title=Adblock Plus - Surf the web without annoying ads!
 noheading=True
 localefile=index
 
 {#
  # This file is part of the Adblock Plus website,
  # Copyright (C) 2006-2016 Eyeo GmbH
  #
  # Adblock Plus is free software: you can redistribute it and/or modify
  # it under the terms of the GNU General Public License version 3 as
@@ skipping 113 matching lines @@
     </div>
     <div class="warning-platform firefox">{{"It appears that you are using Mozilla Firefox."|translate("s28")}} <a href="firefox">{{"Switch to Adblock Plus for Firefox."|translate("s29")}}</a></div>
     <div class="warning-platform chrome">{{"It appears that you are using Google Chrome."|translate("s30")}} <a href="chrome">{{"Switch to Adblock Plus for Chrome."|translate("s31")}}</a></div>
     <div class="warning-platform android">{{"It appears that you are using Android."|translate("s32")}} <a href="android">{{"Switch to Adblock Plus for Android."|translate("s33")}}</a></div>
     <div class="warning-platform opera">{{"It appears that you are using Opera."|translate("s34")}} <a href="opera">{{"Switch to Adblock Plus for Opera."|translate("s35")}}</a></div>
     <div class="warning-platform internet-explorer">{{"It appears that you are using Internet Explorer."|translate("s36")}} <a href="internet-explorer">{{"Switch to Adblock Plus for Internet Explorer."|translate("s37")}}</a></div>
     <div class="warning-platform safari">{{"It appears that you are using Safari."|translate("s38")}} <a href="safari">{{"Switch to Adblock Plus for Safari."|translate("s39")}}</a></div>
     <div class="warning-platform yandex-browser">{{"It appears that you are using Yandex Browser."|translate("s40")}} <a href="yandex-browser">{{"Switch to Adblock Plus for Yandex Browser."|translate("s41")}}</a></div>
     <div class="warning-platform maxthon">{{"It appears that you are using Maxthon."|translate("s42")}} <a href="maxthon">{{"Switch to Adblock Plus for Maxthon."|translate("s43")}}</a></div>
   </div>
-  <iframe frameborder="0" height="285" id="video" itemprop="video" src="//www.youtube-nocookie.com/embed/pVYtzF5SemU?html5=1&amp;autohide=1&amp;enablejsapi=1&amp;controls=2&amp;fs=1&amp;modestbranding=1&amp;rel=0&amp;showinfo=0&amp;theme=light" width="520"></iframe>
+  <iframe frameborder="0" height="285" id="video" itemprop="video" src="//www.youtube-nocookie.com/embed/pVYtzF5SemU?html5=1&amp;autohide=1&amp;enablejsapi=1&amp;controls=2&amp;fs=1&amp;modestbranding=1&amp;rel=0&amp;showinfo=0&amp;theme=light" width="520" allowfullscreen></iframe>
   <img height="305" id="maxthon-instruction" src="/img/maxthon-instruction.png" width="540">
   <img id="edge-teaser" src="/img/edge_teaser.png" alt={{"Comming soon image of Adblock Plus for Microsoft Edge"|translate("edge-teaser")}} />
 </div>
 
 <div id="key-facts">
   <section class="first">
     <div class="sprite" id="facts-open-source"></div>
     <h1>{{"Open Source"|translate("s44")}}</h1>
     <p>
         {{"Adblock Plus is an open source project.\n      <a href=\"contribute\">Join us!</a>"|translate("s45")}}
@@ skipping 217 matching lines @@
       <h2>{{"Be notified when Adblock Plus for Microsoft Edge is available!"|translate("abp-for-edge-be-notified")}}</h2>
 
       <p>
         {{"Microsoft Edge <a href='https://wpdev.uservoice.com/forums/257854-microsoft-edge-developer/suggestions/6508820-javascript-browser-extensions'>does not yet support extensions</a>. However, you can be sure that a version of Adblock Plus for Microsoft Edge will be released as soon as possible. While you're waiting, you may want to try the latest version of Adblock Plus for Internet Explorer."|translate("ms-edge-description")}}
       </p>
     </div>
   </div>
 </section>
 
 <script src="/js/index.js"></script>