fix app

app.py

@@ -256,10 +256,10 @@ with gr.Blocks(css=css) as demo:
             """
         )
 
-        prompt_in = gr.Textbox(label="Prompt", placeholder="A chihuahua in astronaut suit floating in space, cinematic lighting, glow effect")
-        output_size = gr.Radio(["576x1024", "256x256"], label="Output Size", info="576x1024 is watermark-free"),
+        prompt_in = gr.Textbox(label="Prompt", placeholder="A chihuahua in astronaut suit floating in space, cinematic lighting, glow effect", elem_id="prompt-in")
+        output_size = gr.Radio(["576x1024", "256x256"], value='256x256', label="Output Size", info="576x1024 is watermark-free", elem_id="output-size"),
         submit_btn = gr.Button("Generate")
-        video_result = gr.Video(label="Video Output")
+        video_result = gr.Video(label="Video Output", elem_id="video-output")
 
         # gr.Examples(examples=examples, inputs=[prompt_in, output_size])