[tver] improve title extraction(closes #28418)

youtube_dl/extractor/tver.py

@@ -9,6 +9,7 @@
     int_or_none,
     remove_start,
     smuggle_url,
+    strip_or_none,
     try_get,
 )
 
@@ -25,6 +26,10 @@ class TVerIE(InfoExtractor):
     }, {
         'url': 'https://tver.jp/episode/79622438',
         'only_matching': True,
+    }, {
+        # subtitle = ' '
+        'url': 'https://tver.jp/corner/f0068870',
+        'only_matching': True,
     }]
     _TOKEN = None
     BRIGHTCOVE_URL_TEMPLATE = 'http://players.brightcove.net/%s/default_default/index.html?videoId=%s'
@@ -47,8 +52,12 @@ def _real_extract(self, url):
         }
 
         if service == 'cx':
+            title = main['title']
+            subtitle = strip_or_none(main.get('subtitle'))
+            if subtitle:
+                title += ' - ' + subtitle
             info.update({
-                'title': main.get('subtitle') or main['title'],
+                'title': title,
                 'url': 'https://i.fod.fujitv.co.jp/plus7/web/%s/%s.html' % (p_id[:4], p_id),
                 'ie_key': 'FujiTVFODPlus7',
             })