WASM in 2026: What I Found After Testing It for a Video Platform

I'm an IT engineer at an online video platform company. My job involves constantly evaluating new technologies to deliver better services to our clients. Last year, a question came up within the team: "What if we could process video directly in the browser, without a server?" That single question pulled me down a WASM rabbit hole. Why In-Browser Video Processing? One of the services we provide to clients involves video upload and processing. The traditional approach was straightforward — users upload a file, the server handles encoding, splitting, and analysis, then returns the result. The problem was cost and latency. The larger the file, the higher the server cost, and the longer the wait. It felt wasteful to route even simple preprocessing or analysis tasks through a server. "What if we could handle this on the client side?" That idea was the starting point for evaluating WASM. Can WASM Actually Handle Video Processing in the Browser? The short answer: yes. And more than you'd expec