Build Commercial Video Editing Website

I need a full-featured video-editing website built specifically for commercial use. Think of a modern, browser-based platform where paying customers can upload footage, edit online, and export their finished videos without installing desktop software. I’m after a clean, intuitive interface, strong performance with large files, and a back-end that can scale as the user base grows. I’m open to your recommendations on the tech stack, but you should be comfortable working with popular front-end frameworks (React, Vue, or similar), transcoding libraries (FFmpeg, for instance), and a cloud environment that keeps rendering times reasonable. Security, user authentication, and clear billing hooks are essential because this will be a revenue-generating product. Deliverables • Responsive web app with core editing timeline, clip trimming, and audio controls • Secure user accounts, payment integration, and admin dashboard • Reliable video processing pipeline and export options (MP4 at minimum) • Deployment documentation and brief hand-off session so I can manage updates independently Please outline your proposed architecture, any third-party services you’d integrate, and a rough milestone schedule when you respond.