-        info = self._download_webpage(json_url, title,
-                                      'Downloading JSON config')
-        video_url = json.loads(info)['renditions'][0]['url']
-
-        return {'id': video_id,
-                'ext': 'mp4',
-                'url': video_url,
-                'title': title,
-                }
+        info = self._download_json(json_url, title, 'Downloading JSON config')
+        video_url = info['renditions'][0]['url']
+
+        return {
+            'id': video_id,
+            'ext': 'mp4',
+            'url': video_url,
+            'title': title,
+        }