[prosiebensat1] Add support for sat1gold (#10745)

youtube_dl/extractor/prosiebensat1.py

@@ -122,7 +122,17 @@ class ProSiebenSat1BaseIE(InfoExtractor):
 class ProSiebenSat1IE(ProSiebenSat1BaseIE):
     IE_NAME = 'prosiebensat1'
     IE_DESC = 'ProSiebenSat.1 Digital'
-    _VALID_URL = r'https?://(?:www\.)?(?:(?:prosieben|prosiebenmaxx|sixx|sat1|kabeleins|the-voice-of-germany|7tv|kabeleinsdoku)\.(?:de|at|ch)|ran\.de|fem\.com)/(?P<id>.+)'
+    _VALID_URL = r'''(?x)
+                    https?://
+                        (?:www\.)?
+                        (?:
+                            (?:
+                                prosieben|prosiebenmaxx|sixx|sat1(?:gold)?|kabeleins|the-voice-of-germany|7tv|kabeleinsdoku
+                            )\.(?:de|at|ch)|
+                            ran\.de|fem\.com
+                        )
+                        /(?P<id>.+)
+                    '''
 
     _TESTS = [
         {
@@ -295,6 +305,11 @@ class ProSiebenSat1IE(ProSiebenSat1BaseIE):
             'url': 'http://www.kabeleinsdoku.de/tv/mayday-alarm-im-cockpit/video/102-notlandung-im-hudson-river-ganze-folge',
             'only_matching': True,
         },
+        {
+            # geo restricted to Germany
+            'url': 'http://www.sat1gold.de/tv/edel-starck/video/11-staffel-1-episode-1-partner-wider-willen-ganze-folge',
+            'only_matching': True,
+        },
     ]
 
     _TOKEN = 'prosieben'