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-rw-r--r--youtube_dl/extractor/nationalgeographic.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/youtube_dl/extractor/nationalgeographic.py b/youtube_dl/extractor/nationalgeographic.py
index 0027ff1b8..890e8d5bc 100644
--- a/youtube_dl/extractor/nationalgeographic.py
+++ b/youtube_dl/extractor/nationalgeographic.py
@@ -119,7 +119,7 @@ class NationalGeographicIE(ThePlatformIE):
auth_resource_id = self._search_regex(
r"video_auth_resourceId\s*=\s*'([^']+)'",
webpage, 'auth resource id')
- query['auth'] = self._extract_mvpd_auth(url, display_id, 'natgeo', auth_resource_id) or ''
+ query['auth'] = self._extract_mvpd_auth(url, display_id, 'natgeo', auth_resource_id)
return {
'_type': 'url_transparent',