From 3ec7ee6baa8103163e437d077f3ebb734e598cda Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Sun, 2 Jun 2024 17:44:00 +0200
Subject: [PATCH] [downloader:ytdl] fix exception due to missing 'ext' (#5675)

---
 gallery_dl/downloader/ytdl.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gallery_dl/downloader/ytdl.py b/gallery_dl/downloader/ytdl.py
index adada752..87e77562 100644
--- a/gallery_dl/downloader/ytdl.py
+++ b/gallery_dl/downloader/ytdl.py
@@ -89,6 +89,11 @@ class YoutubeDLDownloader(DownloaderBase):
         formats = info_dict.get("requested_formats")
         if formats and not compatible_formats(formats):
             info_dict["ext"] = "mkv"
+        elif "ext" not in info_dict:
+            try:
+                info_dict["ext"] = info_dict["formats"][0]["ext"]
+            except LookupError:
+                info_dict["ext"] = "mp4"
 
         if self.outtmpl:
             self._set_outtmpl(ytdl_instance, self.outtmpl)