[pbs] Add support for widget URLs (Fixes #2594)

test/test_all_urls.py

@@ -141,6 +141,7 @@ class TestAllURLsMatching(unittest.TestCase):
     def test_pbs(self):
         # https://github.com/rg3/youtube-dl/issues/2350
         self.assertMatch('http://video.pbs.org/viralplayer/2365173446/', ['PBS'])
+        self.assertMatch('http://video.pbs.org/widget/partnerplayer/980042464/', ['PBS'])
 
 if __name__ == '__main__':
     unittest.main()

youtube_dl/extractor/pbs.py

@@ -13,7 +13,7 @@ class PBSIE(InfoExtractor):
             # Article with embedded player
            (?:www\.)?pbs\.org/(?:[^/]+/){2,5}(?P<presumptive_id>[^/]+)/?(?:$|[?\#]) |
            # Player
-           video\.pbs\.org/partnerplayer/(?P<player_id>[^/]+)/
+           video\.pbs\.org/(?:widget/)?partnerplayer/(?P<player_id>[^/]+)/
         )
     '''