Good video.
In the early 90s for maybe a year the HQS course was on SO members' basic training. I supervised maybe a dozen fresh staff on it, mostly teenagers recruited for Bridge by Gavin Potter. Few if any had had any prior auditing. They learned the (simplified) basics of auditing, and got to give and receive auditing on two SA lists, tending to average about 10-15 hours each. They mostly did well at it.
I loved delivering the HQS course to them. It was likely the only auditing they would ever get apart from sec checks -- which don't really count -- and certainly the only tech training. There were people who'd been in the Flag Bureaux, managing service orgs, who had had zero auditing or tech training, often after years. Which is part of why, on the receiving end in a service org, one got such silly orders. Part of why, not all of why!
Anyway, I liked SA. Harmless, nay, gently beneficial even.
(Would I recommend it to anyone now? No, because it doesn't exist in a vacuum -- it might make a person think Scientology is worth getting into more.)
Paul