Unlike standard HTTPS where certificate provisioning is mostly automated, WebTransport and QUIC enforce strict TLS 1.3, ALPN, and certificate constraints that often stall real-time media projects. This guide breaks down the transport-level quirks and certificate requirements unique to modern QUIC-based stacks. It is an indispensable troubleshooting reference if you are dealing with handshake errors or trying to establish a sane local development workflow.