Hi there, @ZombieQueen.
I'll lend a hand on how you can get the videos from the webinar you joined.
You can visit this Webinars and Events page and modify the status to see those pre-recorded webinars in QuickBooks Online.
Feel free to check out this article for more details about QuickBooks Webinars: Watch In the Know webinars.
I’m always ready to assist you if you have any other QBO-related tasks. Tag me in your reply, and I’ll sprint back into action. Have a good one, and keep safe.