-        self.assertEqual(YoutubeIE()._extract_id(result['url']), 'FXxLjLQi3Fg')
-
-    def test_issue_673(self):
-        dl = FakeYDL()
-        ie = YoutubePlaylistIE(dl)
-        result = ie.extract('PLBB231211A4F62143')
-        self.assertTrue(len(result['entries']) > 25)
-
-    def test_youtube_playlist_long(self):
-        dl = FakeYDL()
-        ie = YoutubePlaylistIE(dl)
-        result = ie.extract('https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q')
-        self.assertIsPlaylist(result)
-        self.assertTrue(len(result['entries']) >= 799)
-
-    def test_youtube_playlist_with_deleted(self):
-        #651
-        dl = FakeYDL()
-        ie = YoutubePlaylistIE(dl)
-        result = ie.extract('https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC')
-        ytie_results = [YoutubeIE()._extract_id(url['url']) for url in result['entries']]
-        self.assertFalse('pElCt5oNDuI' in ytie_results)
-        self.assertFalse('KdPEApIVdWM' in ytie_results)
-        
-    def test_youtube_playlist_empty(self):
-        dl = FakeYDL()
-        ie = YoutubePlaylistIE(dl)
-        result = ie.extract('https://www.youtube.com/playlist?list=PLtPgu7CB4gbZDA7i_euNxn75ISqxwZPYx')
-        self.assertIsPlaylist(result)
-        self.assertEqual(len(result['entries']), 0)