1 files changed, 2 insertions, 0 deletions
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index 6737c1965..96f41ddd4 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -2107,6 +2107,8 @@ def sanitize_filename(s, restricted=False, is_id=False):
             return '_'
         return char
 
+    if s == '':
+        return ''
     # Handle timestamps
     s = re.sub(r'[0-9]+(?::[0-9]+)+', lambda m: m.group(0).replace(':', '_'), s)
     result = ''.join(map(replace_insane, s))