Fix video URL for MP4 version

Bug 731650 - Apps video isn't playing on Mac OS X and Windows Safari browsers

apps/marketplace/templates/marketplace/marketplace.html

@@ -52,7 +52,7 @@
         controls="controls">
         <source src="//videos-cdn.mozilla.net/serv/flux/apps/marketplace.webm" type="video/webm" />
         <source src="//videos-cdn.mozilla.net/serv/flux/apps/marketplace.theora.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" />
-        <source src="//http://videos-cdn.mozilla.net/serv/flux/apps/marketplace.mp4" type="video/mp4" />
+        <source src="//videos-cdn.mozilla.net/serv/flux/apps/marketplace.mp4" type="video/mp4" />
         <object type="application/x-shockwave-flash"
           style="width: 640px; height: 388px;"
           data="/media/flash/playerWithControls.swf?flv=serv/flux/apps/marketplace.mp4&amp;autoplay=false&amp;msg=Play%20Video">