diff --git a/youtube_dl/extractor/nfl.py b/youtube_dl/extractor/nfl.py
index 55dc6107d..4c35c561b 100644
--- a/youtube_dl/extractor/nfl.py
+++ b/youtube_dl/extractor/nfl.py
@@ -151,7 +151,7 @@ def _real_extract(self, url):
             group='config'))
         # For articles, the id in the url is not the video id
         video_id = self._search_regex(
-            r'(?:<nflcs:avplayer[^>]+data-contentId\s*=\s*|contentId\s*:\s*)(["\'])(?P<id>.+?)\1',
+            r'(?:<nflcs:avplayer[^>]+data-content[Ii]d\s*=\s*|content[Ii]d\s*:\s*)(["\'])(?P<id>.+?)\1',
             webpage, 'video id', default=video_id, group='id')
         config = self._download_json(config_url, video_id, 'Downloading player config')
         url_template = NFLIE.prepend_host(