yt_dlp/extractor/youtube.py

@@ -567,8 +567,8 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
         self._set_cookie('.youtube.com', name='PREF', value=urllib.parse.urlencode(pref))
 
     def _initialize_cookie_auth(self):
-        yt_sapisid, yt_1psapisid, yt_3psapisid = self._get_sid_cookies()
-        if yt_sapisid or yt_1psapisid or yt_3psapisid:
+        self._load_sid_cookies()
+        if self._SAPISID or self._1PSAPISID or self._3PSAPISID:
             self.write_debug('Found YouTube account cookies')
 
     def _real_initialize(self):
@@ -648,21 +648,24 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
 
         return f'{scheme} {"_".join(parts)}'
 
-    def _get_sid_cookies(self):
-        """
-        Get SAPISID, 1PSAPISID, 3PSAPISID cookie values
-        @returns sapisid, 1psapisid, 3psapisid
-        """
+    _SAPISID = _3PSAPISID = _1PSAPISID = None
+
+    def _load_sid_cookies(self):
         yt_cookies = self._get_cookies('https://www.youtube.com')
         yt_sapisid = try_call(lambda: yt_cookies['SAPISID'].value)
         yt_3papisid = try_call(lambda: yt_cookies['__Secure-3PAPISID'].value)
-        yt_1papisid = try_call(lambda: yt_cookies['__Secure-1PAPISID'].value)
 
-        # Sometimes SAPISID cookie isn't present but __Secure-3PAPISID is.
-        # YouTube also falls back to __Secure-3PAPISID if SAPISID is missing.
-        # See: https://github.com/yt-dlp/yt-dlp/issues/393
+        if not self._SAPISID:
+            # Sometimes SAPISID cookie isn't present but __Secure-3PAPISID is.
+            # YouTube also falls back to __Secure-3PAPISID if SAPISID is missing.
+            # See: https://github.com/yt-dlp/yt-dlp/issues/393
+            self._SAPISID = yt_sapisid or yt_3papisid
 
-        return yt_sapisid or yt_3papisid, yt_1papisid, yt_3papisid
+        if not self._1PSAPISID:
+            self._1PSAPISID = try_call(lambda: yt_cookies['__Secure-1PAPISID'].value)
+
+        if not self._3PSAPISID:
+            self._3PSAPISID = yt_3papisid
 
     def _get_sid_authorization_header(self, origin='https://www.youtube.com', user_session_id=None):
         """
@@ -677,11 +680,11 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
         if user_session_id:
             additional_parts['u'] = user_session_id
 
-        yt_sapisid, yt_1psapisid, yt_3psapisid = self._get_sid_cookies()
+        self._load_sid_cookies()
 
-        for scheme, sid in (('SAPISIDHASH', yt_sapisid),
-                            ('SAPISID1PHASH', yt_1psapisid),
-                            ('SAPISID3PHASH', yt_3psapisid)):
+        for scheme, sid in (('SAPISIDHASH', self._SAPISID),
+                            ('SAPISID1PHASH', self._1PSAPISID),
+                            ('SAPISID3PHASH', self._3PSAPISID)):
             if sid:
                 authorizations.append(self._make_sid_authorization(scheme, sid, origin, additional_parts))
 
@@ -738,9 +741,7 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
         if not data_sync_id:
             return None, None
         first, _, second = data_sync_id.partition('||')
-        if second:
-            return first, second
-        return None, first
+        return first if second else None, second if second else first
 
     def _extract_delegated_session_id(self, *args):
         """