catalog page - rewrite youtube url to be local

templates/themes/catalog/catalog.html

@@ -63,7 +63,7 @@
                                 <div class="thread grid-li grid-size-small">
                                         <a href="{{post.link}}">
 						{% if post.youtube %}
-							<img src="//img.youtube.com/vi/{{ post.youtube }}/0.jpg"
+							<img src="/vi/{{ post.youtube }}/0.jpg"
 						{% else %}
 							<img src="{{post.file}}"
 						{% endif %}