diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 893b7f41f..9c17f721d 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -1787,7 +1787,7 @@ def _search_nextjs_v13_data(self, webpage, video_id, fatal=True):
             return nextjs_data
 
         def flatten(flight_data):
-            if not isinstance(flight_data, list) or not flight_data:
+            if not isinstance(flight_data, list):
                 return
             if len(flight_data) == 4 and flight_data[0] == '$':
                 _, name, _, data = flight_data