Update app.py

app.py

@@ -38,11 +38,12 @@ if st.button('확인'):
     if youtube_url:
         try:
             # 새로운 URL이 입력되었을 때 세션 초기화
-            if st.session_state.confirmed and st.session_state.youtube_url != youtube_url:
+            if 'youtube_url' in st.session_state and st.session_state.youtube_url != youtube_url:
                 st.session_state.confirmed = False  # 세션 초기화
                 st.session_state.pop('info_dict', None)
                 st.session_state.pop('thumbnail_url', None)
                 st.session_state.pop('formats', None)
+                st.session_state.pop('youtube_url', None)
 
             st.session_state.youtube_url = youtube_url
             info_dict = fetch_video_info(youtube_url)