This video demonstrates how to use namespaces, custom DNS, and custom certificates with Amazon VPC Lattice and Amazon EKS. The presenter, Tim Dormer, walks through creating a customer certificate in AWS Certificate Manager, setting up a Gateway object in Kubernetes, and configuring HTTP routes for VPC Lattice services across different namespaces. He also shows how to add Route 53 entries for custom domain names and tests the setup. The demonstration highlights the integration of EKS with VPC Lattice, showcasing how to manage microservices across different namespaces with custom DNS and certificates.