Update README.md

Author: Tbbaby

README.md

@@ -418,6 +418,8 @@ After launching the main interface, fill in the corresponding User ID, OpenAI AP
 <img width="645" height="645" alt="image" src="https://github.com/user-attachments/assets/b88f965a-cae5-4ba5-8d29-b82f90e2dac9" />
 
 After entering the system, you can use the Help button to view the functions of each button.
+<!--## Demo-->
+[![Watch the video](https://img.youtube.com/vi/y9Igs0FnX_M/maxresdefault.jpg)](https://youtu.be/y9Igs0FnX_M)
 
 ## 🎯Reproduce
 ```bash