Yes, we provide a large number of the movies fom our MoodleBites courses to the HRDNZMoodlePartner YouTube channel In terms of updating Moodle though we deal with that via Lessons within the Administrators course - because there are a number of quite different approaches - using .zip/.tar download, using git (and until recently using cvs).
I've started a Forum post elsewhere about the poor documentation regarding git for a typical Moodle admin, but for a simple upgrade (using .zip/.tar file) upgrading Moodle is pretty easy these days - just follow the Moodle Docs
PS - I wouldn't advise that you start offering training to other Teachers on how to upgrade Moodle any time soon if you are struggling with this now yourself - there are so many different factors (e.g. Windows / Linux as the platform, etc.) and it takes a lot of varied experience to guide others in this area.
Stu