From 9665f15a960c4e274b0be5fbf22e6f4a6680d162 Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan.ytdlp@gmail.com>
Date: Sat, 17 Sep 2022 11:34:04 +0530
Subject: [PATCH] [outtmpl] Make `%s` work in strfformat for all systems

---
 yt_dlp/utils.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index a24ca828e0..f6f7c38d10 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -2567,6 +2567,8 @@ def strftime_or_none(timestamp, date_format, default=None):
             datetime_object = datetime.datetime.utcfromtimestamp(timestamp)
         elif isinstance(timestamp, str):  # assume YYYYMMDD
             datetime_object = datetime.datetime.strptime(timestamp, '%Y%m%d')
+        date_format = re.sub(  # Support %s on windows
+            r'(?<!%)(%%)*%s', rf'\g<1>{int(datetime_object.timestamp())}', date_format)
         return datetime_object.strftime(date_format)
     except (ValueError, TypeError, AttributeError):
         return default