docs: Allow d.a.c. to serve .OGV

This is necessary for HTML5 video in Firefox.

Change-Id: Ifcc39c338db64aa6c05418c1f3235bda62081f9b
diff --git a/scripts/app_engine_server/memcache_zipserve.py b/scripts/app_engine_server/memcache_zipserve.py
index 15cbb1e..34f00c6 100644
--- a/scripts/app_engine_server/memcache_zipserve.py
+++ b/scripts/app_engine_server/memcache_zipserve.py
@@ -349,6 +349,10 @@
       self.response.headers['Content-Type'] = 'video/webm'
       self.SetCachingHeaders(mustRevalidate)
       self.response.out.write(resp_data)
+    elif name.endswith('.ogv'):
+      self.response.headers['Content-Type'] = 'video/ogg'
+      self.SetCachingHeaders(mustRevalidate)
+      self.response.out.write(resp_data)
     return True
 
   def GetFromStore(self, file_path):