diff -r 44a5801ed246 -r 514dc9b6f875 cms/app-client/app/services/constants.js
--- a/cms/app-client/app/services/constants.js	Fri Dec 23 13:24:04 2016 +0100
+++ b/cms/app-client/app/services/constants.js	Tue Jan 17 13:30:54 2017 +0100
@@ -312,6 +312,17 @@
 
 const AUTOSCROLL_RATE = 35; // 35px/s
 
+const MEDIA_TYPE_WEIGHT = {
+    "audio/mpeg": 1,
+    "audio/x-wav": 2,
+    "video/3gpp": 10,
+    "video/ogg": 11,
+    "video/mp4": 12,
+    "video/x-msvideo": 13,
+    "video/quicktime": 14,
+    "video/mpeg": 15
+};
+
 export default Ember.Service.extend({
   OLAC_ROLES: OLAC_ROLES,
   DISCOURSE_CATEGORY_KEYS: DISCOURSE_CATEGORY_KEYS,
@@ -322,5 +333,6 @@
   LEXVO_BASE_URL: "http://lexvo.org/id/iso639-3/",
   LANGUAGES_TREEMAP: LANGUAGES_TREEMAP,
   DOCUMENTS_PAGINATION_PERPAGE : DOCUMENTS_PAGINATION_PERPAGE,
-  AUTOSCROLL_RATE: AUTOSCROLL_RATE
+  AUTOSCROLL_RATE: AUTOSCROLL_RATE,
+  MEDIA_TYPE_WEIGHT: MEDIA_TYPE_WEIGHT
 });