diff --git a/example/first_gallery/video.mp4 b/example/first_gallery/video.mp4
old mode 100644
new mode 100755
index 95b7652..1821efb
Binary files a/example/first_gallery/video.mp4 and b/example/first_gallery/video.mp4 differ
diff --git a/prosopopee/themes/exposure/static/css/style.css b/prosopopee/themes/exposure/static/css/style.css
index 3cd4eda..d3594fe 100644
--- a/prosopopee/themes/exposure/static/css/style.css
+++ b/prosopopee/themes/exposure/static/css/style.css
@@ -79,6 +79,7 @@ a {
     height: 100%;
     background-position: center center;
     background-size: cover;
+    overflow: hidden;
 }
 
 .gallery-title {
@@ -262,4 +263,5 @@ nav ul li > a.item-menu::before {
 
 .gallery-cover img.fillWidth {
     height: 100%;
+    width: 100%;
 }
diff --git a/prosopopee/themes/exposure/templates/sections/full-picture.html b/prosopopee/themes/exposure/templates/sections/full-picture.html
index 7367259..4212cd2 100644
--- a/prosopopee/themes/exposure/templates/sections/full-picture.html
+++ b/prosopopee/themes/exposure/templates/sections/full-picture.html
@@ -29,7 +29,7 @@
     </div>
 </section>
 {% else %}
-<section class="full-picture" style="background: transparent url('{{ image }}') no-repeat scroll center top / cover;">
+<section class="full-picture" style="background: transparent url('{{ image }}') no-repeat fixed center top / cover;">
     {% if section.text %}
     <div class="picture-text">
         <div class="picture-text-column">