Update app.py

app.py

@@ -174,6 +174,8 @@ def infer(ref_image_in, ref_video_in):
     
     return mp4_file_path
 
+output_video = gr.Video()
+
 with gr.Blocks() as demo:
     with gr.Column():
         with gr.Row():
@@ -191,7 +193,7 @@ with gr.Blocks() as demo:
                     outputs = [output_video],
                     cache_examples = False
                 )
-            output_video = gr.Video()
+            output_video.render()
     submit_btn.click(
         fn = infer,
         inputs = [ref_image_in, ref_video_in],