diff --git a/knowledge base/yt-dlp.md b/knowledge base/yt-dlp.md
index 2e8c641..8acd4bc 100644
--- a/knowledge base/yt-dlp.md	
+++ b/knowledge base/yt-dlp.md	
@@ -13,6 +13,12 @@ python3 -m pip install -U --user yt-dlp
 # List all available formats.
 yt-dlp -F AK44wAvv2E4
 
+# Check what name will be used for the destination.
+# Output templates at https://github.com/yt-dlp/yt-dlp#output-template
+yt-dlp --get-filename -o "test video.%(ext)s" BaW_jenozKc
+yt-dlp --get-filename -o "%(season)s.%(episode_number)02d.%(episode)s.%(ext)s" \
+  https://www.crunchyroll.com/some/good/serie
+
 # Download all videos in a YouTube channel.
 yt-dlp -f "bestvideo+bestaudio/best" -ciw \
   -o "%(title)s.%(ext)s" -v https://www.youtube.com/c/pbsspacetime/videos