Add brackets to output

app.py

@@ -87,6 +87,6 @@ with gr.Blocks(css=css) as demo:
       with gr.Row(elem_id="btn-container"):
         send_btn = gr.Button(value="Send", elem_id="submit-btn")      
       video_output = gr.Video()
-      send_btn.click(infer, inputs=[prompt_input], outputs=video_output)
+      send_btn.click(infer, inputs=[prompt_input], outputs=[video_output])
 
 demo.queue().launch(debug=True)