diff --git a/py/middleware/cache_middleware.py b/py/middleware/cache_middleware.py
index 374ef793..4df22b30 100644
--- a/py/middleware/cache_middleware.py
+++ b/py/middleware/cache_middleware.py
@@ -16,6 +16,7 @@ IMG_EXTENSIONS = (
     ".tif",
     ".tiff",
     ".webp",
+    ".mp4"
 )