diff --git a/demo_video.md b/demo_video.md
index 9c62f13..51877d8 100644
--- a/demo_video.md
+++ b/demo_video.md
@@ -1,5 +1,10 @@
 # Demo (示範影片)
 
+### 2024-01-18: 
+調整KKTIX驗證問題的輸入
+
+https://youtu.be/R65wvmbCe2A
+
 ### 2024-01-17: 
 調整ibon驗證問題的輸入