diff --git a/20260105091950.md b/20260105091950.md
index 4c07458..a7f1407 100644
--- a/20260105091950.md
+++ b/20260105091950.md
@@ -10,3 +10,5 @@
 - focus on cash flow
 - Understand system from different perspectives.
 
+[[https://youtu.be/hzkm3hM8FUg?si=9s0gHcA7mnUNLBur]]
+