Make video features work with .ogv videos.

src/Images/Gallery.coffee

@@ -133,7 +133,7 @@ Gallery =
 
   load: (thumb, errorCB) ->
     ext = thumb.href.match /\w*$/
-    elType = $.getOwn({'webm': 'video', 'mp4': 'video', 'pdf': 'iframe'}, ext) or 'img'
+    elType = $.getOwn({'webm': 'video', 'mp4': 'video', 'ogv': 'video', 'pdf': 'iframe'}, ext) or 'img'
     file = $.el elType
     $.extend file.dataset, thumb.dataset
     $.on file, 'error', errorCB

src/config/Config.coffee

@@ -271,7 +271,7 @@ Config =
       ]
       'Replace WEBM': [
         false
-        'Replace webm and mp4 thumbnails with the actual video. Probably will degrade browser performance ;)'
+        'Replace webm, mp4, and ogv thumbnails with the actual video. Probably will degrade browser performance ;)'
       ]
       'Image Prefetching': [
         true

src/platform/$.coffee

@@ -491,7 +491,7 @@ $.unescape = (text) ->
     (({'&amp;': '&', '&#039;': "'", '&quot;': '"', '&lt;': '<', '&gt;': '>', '&#44;': ','})[c])
 
 $.isImage = (url) -> /\.(jpe?g|png|gif|bmp|webp)$/i.test url
-$.isVideo = (url) -> /\.(webm|mp4)$/i.test url
+$.isVideo = (url) -> /\.(webm|mp4|ogv)$/i.test url
 
 $.engine = do ->
   return 'edge'   if /Edge\//.test navigator.userAgent