To follow along you may use either:
Visual Studio 2019 (any edition) with the ASP.NET development workload installed. This will install .NET Core 3.0 for you.
You may also follow along with Visual Studio Code with the .NET Core 3.0 SDK.
All Philly.NET Meetups are streamed live on Mixer and Twitch:
All meetups are recorded and appear on our YouTube channel at https://youtube.com/phillydotnet