diff --git a/yt_dlp/utils/_utils.py b/yt_dlp/utils/_utils.py
index 04dd0f8d2c..464e7228c1 100644
--- a/yt_dlp/utils/_utils.py
+++ b/yt_dlp/utils/_utils.py
@@ -5083,6 +5083,7 @@ class _UnsafeExtensionError(Exception):
         'ts',
         'vob',
         'vp9',
+        'panobf1',
 
         # audio
         *MEDIA_EXTENSIONS.audio,