Update webapp.py

webapp.py

@@ -66,8 +66,8 @@ class DemoCase:
             "Peace Bridge CA": "https://youtu.be/WPMgP2C3_co",
             "San Marcos TX": "https://youtu.be/E8LsKcVpL5A",
             "4Corners Downtown": "https://youtu.be/ByED80IKdIU",
-            "Gangnam Seoul": "https://youtu.be/JbnJAsk1zII",
-            "Time Square NY": "https://youtu.be/UVftxDFol90",
+            "Gangnam Seoul": "https://youtu.be/3ottn7kfRuc",
+            "Time Square NY": "https://youtu.be/QTTTY_ra2Tg",
             "Port Everglades-1": "https://youtu.be/67-73mgWDf0",
             "Port Everglades-2": "https://youtu.be/Nhuu1QsW5LI",
             "Port Everglades-3": "https://youtu.be/Lpm-C_Gz6yM",