[extractor/rtbf] Fix jwt extraction
diff --git a/yt_dlp/extractor/redbee.py b/yt_dlp/extractor/redbee.py
index 89a10448e13..ee510eb40f6 100644
--- a/yt_dlp/extractor/redbee.py
+++ b/yt_dlp/extractor/redbee.py
@@ -11,6 +11,7 @@
     int_or_none,
     strip_or_none,
     traverse_obj,
+    try_call,
     unified_timestamp,
 )
 
@@ -255,7 +256,7 @@ def _get_formats_and_subtitles(self, url, media_id):
         if not login_token:
             self.raise_login_required()
 
-        session_jwt = self._download_json(
+        session_jwt = try_call(lambda: self._get_cookies(url)['rtbf_jwt'].value) or self._download_json(
             'https://login.rtbf.be/accounts.getJWT', media_id, query={
                 'login_token': login_token.value,
                 'APIKey': self._GIGYA_API_KEY,

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Sometimes RTBF returns our jwt session token as a cookie and doesn't allow us to make more requests to `/accounts.getJWT`. 

This fixes an issue where we could only use username and password, but not cookies.

Fixes #4683


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