In this post you will create a AWS serverless web application that will allow you to download and save any YouTube videos to your Amazon Simple Storage Service (Amazon S3) bucket. First you will set up the back end layer using Amazon API Gateway and AWS Lambda. We will use .Net Core 3.1 runtime to host AWS Lambda Code. Then you will create a web application interface, developed using Blazor WebAssembly which will be hosted as a static website with Amazon S3. This website will be accessed via Amazon CloudFront, which is a fast content delivery network (CDN) service that securely delivers static content. We will use Amazon API Gateway to post user request from the front end to the back-end layer.

https://aws.amazon.com/blogs/developer/run-blazor-based-net-web-applications-on-aws-serverless/