diff --git a/youtube_dl/extractor/vidzi.py b/youtube_dl/extractor/vidzi.py
index 9026e778c..d70283479 100644
--- a/youtube_dl/extractor/vidzi.py
+++ b/youtube_dl/extractor/vidzi.py
@@ -54,7 +54,8 @@ def _real_extract(self, url):
                 self._search_regex(
                     r'setup\(([^)]+)\)', code, 'jwplayer data',
                     default=NO_DEFAULT if num == len(codes) else '{}'),
-                video_id, transform_source=js_to_json)
+                video_id, transform_source=lambda s: js_to_json(
+                    re.sub(r'\s*\+\s*window\[.+?\]', '', s)))
             if jwplayer_data:
                 break