[esri] Fix typo

diff --git a/youtube_dl/extractor/esri.py b/youtube_dl/extractor/esri.py
index bf5d2019fb69f5a0f221c6ad3b99ea695dbdc008..d4205d7fbde331e3bb9fc94275da143575ebd454 100644 (file)
--- a/youtube_dl/extractor/esri.py
+++ b/youtube_dl/extractor/esri.py
@@ -61,7 +61,7 @@ class EsriVideoIE(InfoExtractor):
             webpage, 'duration', fatal=False))
 
         upload_date = unified_strdate(self._html_search_meta(
-            'last-modified', webpage, 'upload date', fatal=None))
+            'last-modified', webpage, 'upload date', fatal=False))
 
         return {
             'id': video_id,