add duplicate button

app.py

@@ -449,6 +449,13 @@ with gr.Blocks() as demo:
 
                 with gr.Accordion("Your video IN", open=True) as video_in_drawer:
                     video_in = gr.Video(label="Video IN", format="mp4")
+
+                gr.HTML("""
+                
+                <a href="https://huggingface.co/spaces/{os.environ['SPACE_ID']}?duplicate=true">
+                    <img src="https://huggingface.co/datasets/huggingface/badges/resolve/main/duplicate-this-space-lg-dark.svg" alt="Duplicate this Space" />
+                </a>
+                """)
             
             with gr.Column():
                 with gr.Row():