diff --git a/app/services/material.py b/app/services/material.py
index fd48b24..bc5efaa 100644
--- a/app/services/material.py
+++ b/app/services/material.py
@@ -84,6 +84,9 @@ def save_video(video_url: str, save_dir: str = "") -> str:
     if not save_dir:
         save_dir = utils.storage_dir("cache_videos")
 
+    if not os.path.exists(save_dir):
+        os.makedirs(save_dir)
+
     url_without_query = video_url.split("?")[0]
     url_hash = utils.md5(url_without_query)
     video_id = f"vid-{url_hash}"
diff --git a/app/utils/utils.py b/app/utils/utils.py
index 086e65c..d784282 100644
--- a/app/utils/utils.py
+++ b/app/utils/utils.py
@@ -70,8 +70,6 @@ def storage_dir(sub_dir: str = ""):
     d = os.path.join(root_dir(), "storage")
     if sub_dir:
         d = os.path.join(d, sub_dir)
-    if not os.path.exists(d):
-        os.makedirs(d)
     return d