[vivo] Fix extraction (closes #18906)

youtube_dl/extractor/shared.py

@@ -1,5 +1,7 @@
 from __future__ import unicode_literals
 
+import re
+
 from .common import InfoExtractor
 from ..compat import compat_b64decode
 from ..utils import (
@@ -7,6 +9,7 @@ from ..utils import (
     int_or_none,
     url_or_none,
     urlencode_postdata,
+    unescapeHTML,
 )
 
 
@@ -22,8 +25,7 @@ class SharedBaseIE(InfoExtractor):
 
         video_url = self._extract_video_url(webpage, video_id, url)
 
-        title = compat_b64decode(self._html_search_meta(
+        title = self._extract_title(webpage)
-            'full:title', webpage, 'title')).decode('utf-8')
         filesize = int_or_none(self._html_search_meta(
             'full:size', webpage, 'file size', fatal=False))
 
@@ -35,6 +37,10 @@ class SharedBaseIE(InfoExtractor):
             'title': title,
         }
 
+    def _extract_title(self, webpage):
+        return compat_b64decode(self._html_search_meta(
+            'full:title', webpage, 'title')).decode('utf-8')
+
 
 class SharedIE(SharedBaseIE):
     IE_DESC = 'shared.sx'
@@ -86,6 +92,14 @@ class VivoIE(SharedBaseIE):
         },
     }
 
+    def _extract_title(self, webpage):
+        data_title = self._search_regex(
+            r'data-name\s*=\s*(["\'])(?P<title>(?:(?!\1).)+)\1', webpage,
+            'title', default=None, group='title')
+        if data_title:
+            return unescapeHTML(re.sub(r"\.[a-z0-9]{3,4}$", "", data_title))
+        return self._og_search_title(webpage)
+
     def _extract_video_url(self, webpage, video_id, *args):
         def decode_url(encoded_url):
             return compat_b64decode(encoded_url).decode('utf-8')