betaseries: adding release info

libs/subliminal_patch/providers/betaseries.py

@@ -44,6 +44,10 @@ class BetaSeriesSubtitle(Subtitle):
     def download_link(self):
         return self.download_url
 
+    @property
+    def release_info(self):
+        return self.video_name
+
     def get_matches(self, video):
         matches = self.matches