diff --git a/app/Http/Controllers/Video/TutorialVideoController.php b/app/Http/Controllers/Video/TutorialVideoController.php
index d646b80e..8dfd6564 100644
--- a/app/Http/Controllers/Video/TutorialVideoController.php
+++ b/app/Http/Controllers/Video/TutorialVideoController.php
@@ -190,7 +190,7 @@ public function download(int $id): BinaryFileResponse|RedirectResponse|JsonRespo
      * ?url=1 파라미터: JSON으로 서명URL 반환 (CORS 회피용)
      * 그 외: 로컬 파일 직접 스트리밍
      */
-    public function preview(Request $request, int $id): Response|RedirectResponse|JsonResponse
+    public function preview(Request $request, int $id): Response|RedirectResponse|JsonResponse|BinaryFileResponse
     {
         $tutorial = TutorialVideo::findOrFail($id);