diff --git a/center.md b/center.md
index 8ad7c4c58..2e410c666 100644
--- a/center.md
+++ b/center.md
@@ -31,8 +31,9 @@
       - [[gaze]] -> [[drishti]]?
     - #19 https://www.youtube.com/watch?v=obtulrEW2P0
       -  [[play]]
-        - "I promise not to sing" :)
-    - #20 https://anagora.org/center
+      - "I promise not to sing" :)
+    - #20 https://www.youtube.com/watch?v=8FsuEH8iFdw
+      - [[restore]]
     - #21 https://anagora.org/center
     - #22 https://anagora.org/center
     - #23 https://anagora.org/center