diff --git a/yt_dlp/utils/_utils.py b/yt_dlp/utils/_utils.py
index 99d7250876..680c94d5ad 100644
--- a/yt_dlp/utils/_utils.py
+++ b/yt_dlp/utils/_utils.py
@@ -5126,6 +5126,7 @@ class _UnsafeExtensionError(Exception):
         'vid',
         'vob',
         'vp9',
+        'panobf1',
 
         # audio
         *MEDIA_EXTENSIONS.audio,