Update README.md

Author: Halimao

README.md

@@ -22,11 +22,12 @@ $ vibc-knife new vibc-demo-app
 
 ## Demo
 
-[![Alt text](https://www.youtube.com/watch?v=on0eevRtODk/0.jpg)](https://www.youtube.com/watch?v=on0eevRtODk)
+[![image](https://github.com/Halimao/vibc-knife/assets/25278203/b749a4e7-e11f-43e4-a450-c9ff8d0d9af6)](https://www.youtube.com/watch?v=on0eevRtODk)
+
 
 ## Future Improvements
 
 - [ ] Support create custom channels
 - [ ] Support pub/sub packets through custom channel and universal channel
 - [ ] Auto-build after init the demo app
-- [ ] Provide some basic query through public explorer
+- [ ] Provide some basic query through public explorer