updated video tag sources, fixed dropdown menu positions

vipra-ui/app/html/index.html

@@ -67,7 +67,8 @@
         <div class="col-md-offset-1 col-md-10 col-sm-12">
           <div class="embed-responsive embed-responsive-16by9 screencast">
             <video controls muted poster="img/vipra-logo-big.png">
-              <source src="https://ftp.cochu.io/vipra/screencast.mp4" type="video/mp4">
+              <source src="//ftp.cochu.io/vipra/screencast.mp4" type="video/mp4">
+              <source src="//ftp.cochu.io/vipra/screencast.webm" type="video/webm">
               Your browser does not support the video tag.
             </video>
           </div>

vipra-ui/app/less/app.less

@@ -378,6 +378,9 @@ a:hover {
   .panel {
     margin: 0;
   }
+  .menu-button {
+    left: 5px;
+  }
 }
 
 .item-choice {
@@ -643,7 +646,6 @@ entity-menu {
 .menu-button {
   position: absolute;
   top: 1px;
-  left: 5px;
 }
 
 .menu-padding {