Update app.py

app.py

@@ -83,7 +83,7 @@ with gr.Blocks() as demo:
             with gr.Column():
                 run_btn = gr.Button("Run")
             with gr.Column():
-                output_video = gr.Video()
+                output_video = gr.Video(format="mp4")
     
     run_btn.click(
         fn = infer,