To build a react native video chat app you have to follow the below steps:
https://www.contus.com/blog/how-to-build-a-react-native-video-app/
- Need to start a new project and install the dependencies
- To generate a new project choose the blank template depending upon the device used
- Setup the firebase, the cloud service supported by google to handle authentication and database storage
- Now, create a chat screen with a new directory as components
- Connect the react native chat app with the firebase
- Add the login screen to the chat app and add the functionalities and get it ready
https://www.contus.com/blog/how-to-build-a-react-native-video-app/