[CBC] Fix Gem livestream (#1289)

Authored by: makeworld-the-better-one

yt_dlp/extractor/cbc.py

@@ -377,7 +377,7 @@ def _real_extract(self, url):
 
 class CBCGemLiveIE(InfoExtractor):
     IE_NAME = 'gem.cbc.ca:live'
-    _VALID_URL = r'https?://gem\.cbc\.ca/live/(?P<id>[0-9]{12})'
+    _VALID_URL = r'https?://gem\.cbc\.ca/live/(?P<id>\d+)'
     _TEST = {
         'url': 'https://gem.cbc.ca/live/920604739687',
         'info_dict': {
@@ -396,21 +396,21 @@ class CBCGemLiveIE(InfoExtractor):
 
     # It's unclear where the chars at the end come from, but they appear to be
     # constant. Might need updating in the future.
-    _API = 'https://tpfeed.cbc.ca/f/ExhSPC/t_t3UKJR6MAT'
+    # There are two URLs, some livestreams are in one, and some
+    # in the other. The JSON schema is the same for both.
+    _API_URLS = ['https://tpfeed.cbc.ca/f/ExhSPC/t_t3UKJR6MAT', 'https://tpfeed.cbc.ca/f/ExhSPC/FNiv9xQx_BnT']
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
-        live_info = self._download_json(self._API, video_id)['entries']
 
-        video_info = None
-        for stream in live_info:
-            if stream.get('guid') == video_id:
-                video_info = stream
-
-        if video_info is None:
-            raise ExtractorError(
-                'Couldn\'t find video metadata, maybe this livestream is now offline',
-                expected=True)
+        for api_url in self._API_URLS:
+            video_info = next((
+                stream for stream in self._download_json(api_url, video_id)['entries']
+                if stream.get('guid') == video_id), None)
+            if video_info:
+                break
+        else:
+            raise ExtractorError('Couldn\'t find video metadata, maybe this livestream is now offline', expected=True)
 
         return {
             '_type': 'url_transparent',