[bbccouk] Add support for w-prefixed ids (closes #14056)

youtube_dl/extractor/bbc.py

@@ -29,7 +29,7 @@ from ..compat import (
 class BBCCoUkIE(InfoExtractor):
     IE_NAME = 'bbc.co.uk'
     IE_DESC = 'BBC iPlayer'
-    _ID_REGEX = r'[pb][\da-z]{7}'
+    _ID_REGEX = r'[pbw][\da-z]{7}'
     _VALID_URL = r'''(?x)
                     https?://
                         (?:www\.)?bbc\.co\.uk/
@@ -233,6 +233,9 @@ class BBCCoUkIE(InfoExtractor):
         }, {
             'url': 'https://www.bbc.co.uk/music/audiovideo/popular#p055bc55',
             'only_matching': True,
+        }, {
+            'url': 'http://www.bbc.co.uk/programmes/w3csv1y9',
+            'only_matching': True,
         }]
 
     _USP_RE = r'/([^/]+?)\.ism(?:\.hlsv2\.ism)?/[^/]+\.m3u8'