Windows Server 2016 Active Directory and Domain Controller Setup and Installation https://www.youtube.com/watch?v=qKtn8uSzZrQ
Active Directory overview in Windows Server 2016 https://www.youtube.com/watch?v=mNE3bF08Iow
Understanding Active Directory: 01 Introduction to Active Directory https://www.youtube.com/watch?v=RPzcxdiyVCM