Build a video upload and compression app with Multer and React Native

React Native is a versatile mobile app development framework that enables the creation of apps for both Android and iOS platforms using a single codebase, leveraging JavaScript, which is also used for server-side development with Node.js. The guide details the process of building a full-stack video uploading application using React Native and Firebase, integrated with Multer for handling file uploads. It covers setting up Firebase, configuring a Node.js backend server with necessary endpoints, and creating a React Native frontend with features for video uploading and fetching. The tutorial also addresses the configuration of required packages and dependencies for both Android and iOS platforms, using tools like Tailwind CSS for styling and ngrok for exposing local servers to the internet. Furthermore, it provides detailed code explanations for uploading and handling video files, utilizing components such as DocumentPicker for file selection and Video for playback in the application. The article concludes by highlighting the benefits of using React Native for cross-platform development, providing a seamless experience across different operating systems while maintaining a single codebase.