services: add some more owners from the video team

Change-Id: Ia2eb09da06f5a266630e089af272d2595bce8a68
diff --git a/services/OWNERS b/services/OWNERS
index d5d00da..66a4bcb 100644
--- a/services/OWNERS
+++ b/services/OWNERS
@@ -1,4 +1,7 @@
+chz@google.com
 elaurent@google.com
+essick@google.com
 etalvala@google.com
 gkasten@google.com
 hunga@google.com
+marcone@google.com