fix exposure theme

prosopopee/themes/exposure/static/css/style.css

@@ -261,5 +261,5 @@ nav ul li > a.item-menu::before {
 }
 
 .gallery-cover img.fillWidth {
-    width: 100%;
+    height: 100%;
 }

prosopopee/themes/exposure/templates/index.html

@@ -32,10 +32,10 @@
       {% endif %}
       {% if video %}
       <div class="gallery-cover">
-          <img class="fillWidth" alt="" src="{{ video.generate_thumbnail("900") }}">
           <video autoplay loop muted class="fillWidth">
               <source src="{{ video }}" type="video/webm" data-source="{{ video }}" data-format="vp8" data-extension="webm">
           </video>
+          <img class="fillWidth" alt="" src="{{ video.generate_thumbnail("900") }}">
       </div>
       {% set video = "" %}
       {% else %}