diff --git a/prosopopee/prosopopee.py b/prosopopee/prosopopee.py
index 91c8076..f355480 100644
--- a/prosopopee/prosopopee.py
+++ b/prosopopee/prosopopee.py
@@ -99,7 +99,7 @@ class Video(object):
         return ""
 
     def generate_thumbnail(self, gm_geometry):
-        thumbnail_name = ".".join(self.name.split(".")[:-1]) + "-%s.png" % gm_geometry
+        thumbnail_name = ".".join(self.name.split(".")[:-1]) + "-%s.jpg" % gm_geometry
 
         source, target = self.base_dir.joinpath(self.name), self.target_dir.joinpath(thumbnail_name)
 
diff --git a/prosopopee/themes/exposure/templates/gallery-index.html b/prosopopee/themes/exposure/templates/gallery-index.html
index 2d87cf6..9406c61 100644
--- a/prosopopee/themes/exposure/templates/gallery-index.html
+++ b/prosopopee/themes/exposure/templates/gallery-index.html
@@ -10,6 +10,12 @@
 
         <!--Let browser know website is optimized for mobile-->
         <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+	{% if gallery.description %}
+        <meta name="description" content="{{ gallery.description }}" />
+	{% endif %}
+	{% if gallery.lang %}
+	<meta name="language" content="{{ gallery.lang }}" />
+	{% endif %}
         <title>{{ gallery.title }} · {{ settings.title }}</title>
     </head>
 
diff --git a/prosopopee/themes/exposure/templates/sections/author.html b/prosopopee/themes/exposure/templates/sections/author.html
index 3676d4c..e38e196 100644
--- a/prosopopee/themes/exposure/templates/sections/author.html
+++ b/prosopopee/themes/exposure/templates/sections/author.html
@@ -1,7 +1,7 @@
 {% set image = Image(section.image) %}
 {{ image.copy() }}
 <div class="author-meta">
-    <img src={{ image.generate_thumbnail("200x200") }} alt="" class="circle">
+    <img src={{ image.generate_thumbnail("80x80") }} alt="" class="circle">
     <div>
         <span class=author-info>Story by
         <h4>{{ section.name }}</h4>
diff --git a/prosopopee/themes/exposure/templates/sections/bordered-picture.html b/prosopopee/themes/exposure/templates/sections/bordered-picture.html
index 0c8e907..cc70590 100644
--- a/prosopopee/themes/exposure/templates/sections/bordered-picture.html
+++ b/prosopopee/themes/exposure/templates/sections/bordered-picture.html
@@ -9,7 +9,7 @@
     <section class="bordered-picture baguette" style="position: relative;">
         <div class="caption">
             <img class="lazy" data-original="{{ video.generate_thumbnail("2000") }}" src="" alt="">
-            <video class="lazy" id="video" poster="{{ video.generate_thumbnail("2000") }}" alt="" autoplay="autoplay" loop="loop" preload="auto" muted>
+            <video class="lazy" id="video" poster="{{ video.generate_thumbnail("2000") }}" alt="" autoplay="autoplay" loop="loop" preload="none" muted>
                 <source src="{{ video }}" type="video/webm" data-source="{{ video }}" data-format="vp8" data-extension="webm">
             </video>
             {% if caption %}
diff --git a/prosopopee/themes/exposure/templates/sections/full-picture.html b/prosopopee/themes/exposure/templates/sections/full-picture.html
index dd5331e..dfb5467 100644
--- a/prosopopee/themes/exposure/templates/sections/full-picture.html
+++ b/prosopopee/themes/exposure/templates/sections/full-picture.html
@@ -32,7 +32,7 @@
     {% set image = Image(section.image) %}
     {{ image.copy() }}
 
-    <section class="full-picture" style="background: url('{{ image }}') no-repeat fixed center top / cover, url('{{ image.generate_thumbnail("x450") }}') no-repeat fixed center top / cover transparent;">
+    <section class="full-picture" style="background: url('{{ image.generate_thumbnail("x2000") }}') no-repeat fixed center top / cover, url('{{ image.generate_thumbnail("x450") }}') no-repeat fixed center top / cover transparent;">
 
     {% if section.text %}
         <div class="picture-text">