In this video, Derek Bingham, AWS Developer Advocate, demonstrates how to build a resilient client application using .NET and AWS IoT Core with MQTT protocol. He explains the advantages of MQTT for communicating over unreliable networks and shows step-by-step how to set up AWS IoT Core, create a client application, handle certificates, and implement the MQTT connection. The video covers creating a Thing in AWS IoT Core, generating certificates, setting up security policies, and coding a .NET console application to connect and send messages via MQTT. Derek also demonstrates debugging techniques and how to monitor the connection in the AWS Console.

00:00 Intro
02:00 Setting up AWS IoT Core
05:30 Building the Client
09:52 Certificates
14:35 Summary