use slider

app.py

@@ -91,7 +91,7 @@ if __name__ == "__main__":
                 placeholder="https://www.bilibili.com/video/*",
                 show_copy_button=True,
             ),
-            gr.Number(label="Part", minimum=1, maximum=1000, step=1, value=1),
+            gr.Slider(label="Part", minimum=1, maximum=1000, step=1, value=1),
         ],
         outputs=[
             gr.Textbox(label="Video title", show_copy_button=True),