"video/mp4" mime type added.

conf/mime.types

diff --git a/conf/mime.types b/conf/mime.types
index f750acd..c4ab45e 100644
--- a/conf/mime.types
+++ b/conf/mime.types
@@ -65,6 +65,7 @@
     audio/x-realaudio                     ra;
 
     video/3gpp                            3gpp 3gp;
+    video/mp4                             mp4;
     video/mpeg                            mpeg mpg;
     video/quicktime                       mov;
     video/x-flv                           flv;