diff --git a/src/ted2zim/scraper.py b/src/ted2zim/scraper.py
index 5f9342a..35a9bdc 100644
--- a/src/ted2zim/scraper.py
+++ b/src/ted2zim/scraper.py
@@ -1109,7 +1109,7 @@ def download_video_files(self, video):
             # Second try to download from youtube ID (used both when no video link AND
             # when video link download failed - we experience sometimes 403 errors on
             # video link, see #167)
-            if youtube_id:
+            if not downloaded and youtube_id:
                 try:
                     options = (
                         BestWebm if self.video_format == "webm" else BestMp4