fix: 데모 영상 수정

Author: koomchang

Diff for: index.html

@@ -99,7 +99,7 @@ <h2>
     <h1>데모 영상</h1>
     <div style="text-align: center; height: 65.5vh">
         <iframe width="100%" height="100%"
-                src="https://www.youtube.com/embed/FrrprXipEL8?si=_sKbTYFxfCX7ovGy"
+                src="https://www.youtube.com/embed/1pInEUi9LwE?si=t3bf3Os2U_V8G9i4"
                 title="YouTube video player" frameborder="0"
                 allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
                 referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>