diff --git a/personal_data/fetchers/youtube.py b/personal_data/fetchers/youtube.py
index 6b3de5b..a193bf2 100644
--- a/personal_data/fetchers/youtube.py
+++ b/personal_data/fetchers/youtube.py
@@ -37,8 +37,17 @@ class YoutubeFavoritesScraper(Scraper):
     def to_csv(self, videos: list[dict]) -> str:
         """Convert the list of videos to CSV format."""
         headers = ['id', 'title', 'url', 'upload_date']
-        rows = [headers] + [[video.get('id'), video.get('title'), video.get('url'), video.get('upload_date')] for video in videos]
+        rows = [headers] + [
+            [
+                video.get('id'),
+                video.get('title'),
+                video.get('url'),
+                video.get('upload_date'),
+            ]
+            for video in videos
+        ]
         from io import StringIO
+
         sio = StringIO()
         csv.writer(sio).writerows(rows)
         return sio.getvalue()