This article guides developers on implementing end-to-end direct uploads using Mux Video API, focusing on verifying the direct upload with webhooks in a local development environment. The process involves setting up an endpoint for webhooks and testing it locally by creating a tunnel with Cloudflare Tunnels. It also explains the differences between webhooks and polling and how to set up Mux webhooks. Finally, it demonstrates how to verify video uploads via webhooks by observing browser console logs or terminal window where the server is running.