[bbc] Extract _ID_REGEX and ad one more video id pattern (Closes #7724)

youtube_dl/extractor/bbc.py

@@ -22,7 +22,8 @@ from ..compat import (
 class BBCCoUkIE(InfoExtractor):
     IE_NAME = 'bbc.co.uk'
     IE_DESC = 'BBC iPlayer'
-    _VALID_URL = r'https?://(?:www\.)?bbc\.co\.uk/(?:(?:programmes/(?!articles/)|iplayer(?:/[^/]+)?/(?:episode/|playlist/))|music/clips[/#])(?P<id>[\da-z]{8})'
+    _ID_REGEX = r'[pb][\da-z]{7}'
+    _VALID_URL = r'https?://(?:(?:www\.)?bbc\.co\.uk/(?:(?:programmes/(?!articles/)|iplayer(?:/[^/]+)?/(?:episode/|playlist/))|music/clips[/#])|)(?P<id>%s)' % _ID_REGEX
 
     _MEDIASELECTOR_URLS = [
         # Provides HQ HLS streams with even better quality that pc mediaset but fails
@@ -465,7 +466,7 @@ class BBCCoUkIE(InfoExtractor):
 
         if not programme_id:
             programme_id = self._search_regex(
-                r'"vpid"\s*:\s*"([\da-z]{8})"', webpage, 'vpid', fatal=False, default=None)
+                r'"vpid"\s*:\s*"(%s)"' % self._ID_REGEX, webpage, 'vpid', fatal=False, default=None)
 
         if programme_id:
             formats, subtitles = self._download_media_selector(programme_id)
@@ -780,8 +781,9 @@ class BBCIE(BBCCoUkIE):
 
         # single video story (e.g. http://www.bbc.com/travel/story/20150625-sri-lankas-spicy-secret)
         programme_id = self._search_regex(
-            [r'data-video-player-vpid="([\da-z]{8})"',
+            [r'data-video-player-vpid="(%s)"' % self._ID_REGEX,
-             r'<param[^>]+name="externalIdentifier"[^>]+value="([\da-z]{8})"'],
+             r'<param[^>]+name="externalIdentifier"[^>]+value="(%s)"' % self._ID_REGEX,
+             r'videoId\s*:\s*["\'](%s)["\']' % self._ID_REGEX],
             webpage, 'vpid', default=None)
 
         if programme_id:
@@ -816,7 +818,7 @@ class BBCIE(BBCCoUkIE):
 
         # Multiple video article (e.g.
         # http://www.bbc.co.uk/blogs/adamcurtis/entries/3662a707-0af9-3149-963f-47bea720b460)
-        EMBED_URL = r'https?://(?:www\.)?bbc\.co\.uk/(?:[^/]+/)+[\da-z]{8}(?:\b[^"]+)?'
+        EMBED_URL = r'https?://(?:www\.)?bbc\.co\.uk/(?:[^/]+/)+%s(?:\b[^"]+)?' % self._ID_REGEX
         entries = []
         for match in extract_all(r'new\s+SMP\(({.+?})\)'):
             embed_url = match.get('playerSettings', {}).get('externalEmbedUrl')