Update app.py

app.py

@@ -23,7 +23,7 @@ def generate_video(topic, openai_api_key, stabilityai_api_key, user_mail):
     )
     result = crew.kickoff(inputs={'topic': topic, 'model' : model})
     if 'tmp' in result:
-        result = final_video_filename.split('/')[-1]
+        result = result.split('/')[-1]
     send_mail(user_mail, result)
     return result