Update README.md

V1.2.3 + YT video link!

README.md

@@ -14,9 +14,24 @@ This project has an internal 3D rendering engine that was built by me using Open
 
 You can find more information about FA-Engine here: [FAE Repository](https://github.com/MatinAfzal/FloatArtsEngine)
 
-Any programmer can use the codes in this project to build his own world or help improve ICU.
+Any programmer can use the codes in this project to build his own world or help improve OpenUniverse.
 
 Developer: [@MatinAfzal](https://github.com/MatinAfzal)
 
+Click [here](https://www.youtube.com/watch?v=u1sz5jymhfI) to watch the YouTube video of the project!
+
+![2](https://github.com/user-attachments/assets/80d340bf-94b9-4515-8e91-b43c219624f1)
+
+
+## Usage
+
+Open cmd:
+```
+C:\Windows\system32> cd ./<path>/main
+```
+```
+C:\TheJumonRunner> python OpenUniverse.py
+```
 
 ![3DICU_Screenshot1](https://github.com/MatinAfzal/3DICU/assets/128434167/9a1a3d19-8475-4d27-9280-13d635cc2bdd)
+