diff --git a/yt_dlp/extractor/smotrim.py b/yt_dlp/extractor/smotrim.py
index a89c2529b..e2f3b5bb9 100644
--- a/yt_dlp/extractor/smotrim.py
+++ b/yt_dlp/extractor/smotrim.py
@@ -116,4 +116,5 @@ def _real_extract(self, url):
             'thumbnail': json_info['data']['playlist']['medialist'][0]['pictures']['16:9'],
             'formats': formats,
             'subtitles': subtitles,
+            "is_live": json_info['data']['playlist']['type'] == 'live',
         }