On our YouTube channel, there are two videos that get a lot of consistent views:
Getting started with Foreman & Katello - architecture design, provisioning and Puppet
Foreman Quickstart: installation and Puppet management
The latter is from 2013, and seems to still be a source of truth for people looking to learn more about Foreman.
I would love if we could provide some installation and architectural overview videos for Foreman, and Foreman/Katello users.
Would anyone be interested in helping with the effort to provide better and more up to date versions of these videos?