In this video, Mohammed Wally demonstrates how to run PowerShell scripts on AWS Lambda using a custom runtime. He walks through creating a Lambda function, adding a PowerShell runtime layer, and deploying a simple PowerShell script. The process involves using the AWS Management Console, GitHub, and AWS SAM to build and deploy the custom runtime. This enables developers to leverage serverless computing for PowerShell-based workloads, offering increased flexibility and efficiency. The video provides a step-by-step guide, showcasing the integration of PowerShell with AWS Lambda's scalable infrastructure.