diff --git a/backend/main.py b/backend/main.py
index e9bb1ed8..d0745580 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,4 +1,3 @@
-
 import json
 import logging
 import os
@@ -129,6 +128,8 @@ async def upload(req: Request, exercise: int):
     extension = ".mp4"
     if req.headers.get('content-type') == "video/quicktime":
         extension = ".mov"
+    else: 
+        raise HTTPException(status_code=400, detail="Content type must be video/mp4 or video/quicktime")
     
     get_running_loop().run_in_executor(None, lambda: analyze(id, exercise, extension, video_bytes))
     
@@ -160,7 +161,6 @@ async def event_generator():
             return
         
         result_video_file = result["video_file"]
-        print(result_video_file.name)
         videos[id] = result_video_file
         del result["video_file"]
         
diff --git a/src/AppPage.tsx b/src/AppPage.tsx
index 7e472a33..625d311b 100644
--- a/src/AppPage.tsx
+++ b/src/AppPage.tsx
@@ -207,7 +207,13 @@ export const AppPage = () => {
 
 									sse.current.addEventListener('error', () => {
 										notifications.show({
-											message: 'Failed to open SSE connection.',
+											icon: (
+												<IconX style={{ width: rem(18), height: rem(18) }} />
+											),
+											color: 'red',
+											title: 'Error',
+											autoClose: 10_000,
+											message: 'Error during SSE connection.',
 										});
 										sse.current?.close();
 										sse.current = undefined;