This video demontrates the installation of a Microsoft Windows Server 2019 Operating System.
Requirements;
For activiating Microsoft Windows Server 2019 you will require a Product Key.
For Demo/Lab Enviroments, you can use the below Evaluation links.
Resources;
Microsoft Evaluation Software
https://www.microsoft.com/en-us/evalcenter/
Microsoft Windows Server 2019 Evaluation Software
https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-2019?filetype=ISO