diff --git a/src/auto_archiver/enrichers/thumbnail_enricher.py b/src/auto_archiver/enrichers/thumbnail_enricher.py
index 2958213..2816db5 100644
--- a/src/auto_archiver/enrichers/thumbnail_enricher.py
+++ b/src/auto_archiver/enrichers/thumbnail_enricher.py
@@ -21,10 +21,10 @@ class ThumbnailEnricher(Enricher):
 
     def enrich(self, to_enrich: Metadata) -> None:
         logger.debug(f"generating thumbnails")
-        folder = os.path.join(to_enrich.get_tmp_dir(), str(uuid.uuid4()))
-        os.makedirs(folder, exist_ok=True)
         for i, m in enumerate(to_enrich.media[::]):
             if m.is_video():
+                folder = os.path.join(to_enrich.get_tmp_dir(), str(uuid.uuid4()))
+                os.makedirs(folder, exist_ok=True)
                 logger.debug(f"generating thumbnails for {m.filename}")
                 fps, duration = 0.5, m.get("duration")
                 if duration is not None: