This video is no longer valid. The friends only option has been removed but you can still make a private game Updated Video Here: https://www.youtube.com/watch?v=HUv3zWYgTuI
How to use the server takeover feature to make a private game for your friends.
Currently, The Game Attendant has 184,973 views for Killing Floor 2 across 13 videos. His channel currently has around 2 hours worth of content for Killing Floor 2, roughly 1.61% of the content that The Game Attendant has uploaded to YouTube.