@01:39"...I'm just saying it's not technically correct since there aren't any areas "exclusively" for members (it's all users or only admins, no middle ground yet)."
There aren't any areas for members as you know them (the groups class). This video is referring to "members" as anyone who gets messages from the group (excluding the actual members class). The video isn't wrong, you're just misunderstanding the way it's using the word "members", however, I can understand how it'd be confusing to someone familiar with the system.
Also, about it reaching a wider audience... stay tuned.