Fix bug in ae1035646a

Closes #4881

yt_dlp/utils.py

@@ -1497,6 +1497,10 @@ class YoutubeDLHTTPSHandler(urllib.request.HTTPSHandler):
             raise
 
 
+def is_path_like(f):
+    return isinstance(f, (str, bytes, os.PathLike))
+
+
 class YoutubeDLCookieJar(http.cookiejar.MozillaCookieJar):
     """
     See [1] for cookie file format.
@@ -1515,7 +1519,7 @@ class YoutubeDLCookieJar(http.cookiejar.MozillaCookieJar):
 
     def __init__(self, filename=None, *args, **kwargs):
         super().__init__(None, *args, **kwargs)
-        if self.is_path(filename):
+        if is_path_like(filename):
             filename = os.fspath(filename)
         self.filename = filename
 
@@ -1523,13 +1527,9 @@ class YoutubeDLCookieJar(http.cookiejar.MozillaCookieJar):
     def _true_or_false(cndn):
         return 'TRUE' if cndn else 'FALSE'
 
-    @staticmethod
-    def is_path(file):
-        return isinstance(file, (str, bytes, os.PathLike))
-
     @contextlib.contextmanager
     def open(self, file, *, write=False):
-        if self.is_path(file):
+        if is_path_like(file):
             with open(file, 'w' if write else 'r', encoding='utf-8') as f:
                 yield f
         else: