Installing KoboToolbox on a Local Computer

I’m trying to install and use KoboToolbox on my local computer because I work in an environment with absolutely no Internet access. Unfortunately, I am not quite the advanced user required for this task, and I have already combed the support articles (Installing KoboToolbox on a Local Computer — KoboToolbox documentation) and GitHub links.

Ideally, I need a step-by-step video of the installation process, similar to this video which covers the installation process for your own server (How to install kobotoolbox own server | kobo toolbox installation on server 2021 - YouTube). Does anyone know of that resource? Specifically, I get to the SMTP server? portion of the installation process and do not know how to proceed. Thanks!