diff --git a/youtube_dlc/extractor/gdcvault.py b/youtube_dlc/extractor/gdcvault.py
index 1220be2d95..a248a170db 100644
--- a/youtube_dlc/extractor/gdcvault.py
+++ b/youtube_dlc/extractor/gdcvault.py
@@ -5,9 +5,7 @@ import re
 from .common import InfoExtractor
 from .kaltura import KalturaIE
 from ..utils import (
-    HEADRequest,
     sanitized_Request,
-    smuggle_url,
     urlencode_postdata,
 )
 
@@ -139,7 +137,7 @@ class GDCVaultIE(InfoExtractor):
 
         PLAYER_REGEX = r'<iframe src=\"(?P<manifest_url>.*?)\".*?</iframe>'
         manifest_url = self._html_search_regex(
-                PLAYER_REGEX, webpage, 'manifest_url')
+            PLAYER_REGEX, webpage, 'manifest_url')
 
         partner_id = self._search_regex(
             r'/p(?:artner_id)?/(\d+)', manifest_url, 'partner id',
@@ -156,4 +154,4 @@ class GDCVaultIE(InfoExtractor):
             'id': video_id,
             'display_id': display_id,
             'title': title,
-        }
\ No newline at end of file
+        }