[nhl] Add support for wch2016.com (Closes #10833)

youtube_dl/extractor/nhl.py

@@ -245,7 +245,11 @@ class NHLVideocenterCategoryIE(NHLBaseInfoExtractor):
 
 class NHLIE(InfoExtractor):
     IE_NAME = 'nhl.com'
-    _VALID_URL = r'https?://(?:www\.)?nhl\.com/([^/]+/)*c-(?P<id>\d+)'
+    _VALID_URL = r'https?://(?:www\.)?(?P<site>nhl|wch2016)\.com/(?:[^/]+/)*c-(?P<id>\d+)'
+    _SITES_MAP = {
+        'nhl': 'nhl',
+        'wch2016': 'wch',
+    }
     _TESTS = [{
         # type=video
         'url': 'https://www.nhl.com/video/anisimov-cleans-up-mess/t-277752844/c-43663503',
@@ -270,13 +274,20 @@ class NHLIE(InfoExtractor):
             'upload_date': '20160204',
             'timestamp': 1454544904,
         },
+    }, {
+        'url': 'https://www.wch2016.com/video/caneur-best-of-game-2-micd-up/t-281230378/c-44983703',
+        'only_matching': True,
+    }, {
+        'url': 'https://www.wch2016.com/news/3-stars-team-europe-vs-team-canada/c-282195068',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):
-        tmp_id = self._match_id(url)
+        mobj = re.match(self._VALID_URL, url)
+        tmp_id, site = mobj.group('id'), mobj.group('site')
         video_data = self._download_json(
-            'https://nhl.bamcontent.com/nhl/id/v1/%s/details/web-v1.json' % tmp_id,
+            'https://nhl.bamcontent.com/%s/id/v1/%s/details/web-v1.json'
-            tmp_id)
+            % (self._SITES_MAP[site], tmp_id), tmp_id)
         if video_data.get('type') == 'article':
             video_data = video_data['media']