I think, with the platform ever evolving, it would make sense for ON24 to offer some sort of walkthrough feature using Joyride, or something like it, that highlights all the pieces included in a given webinar: http://zurb.com/playground/jquery-joyride-feature-tour-plugin
It would be a lot less time consuming to maintain for one party than for all the individual companies using ON24, and can be applied each time there's a change to a component/feature, so that the description/information is always accurate.
Also, using something like Joyride would be less time consuming and less costly to produce for ON24 than videos.
Also, ON24 could tailor the walkthrough so that users who have used the platform before can just be directed to recent changes, or take the complete walkthrough again from end-to-end, depending on what they prefer. The walkthrough feature is always there, so users can take a refresher any time. Also, if users provide feedback on the walkthrough, we'd all benefit from the insights.
Lots of possiblities.
Similarly, when new features are rolled out on the dashboard, reports, et cetera, ON24 can leverage the same technology to walk us through those changes the next time we log in to do our work.