BuddyPress.org

Initially I would not focus on us (site admins) but on buddypress its core functions. Explain potential new users what bp can do for them, and their target group and how users can use their bp site. For us all these things are wellknown but there are a lot of people who don’t! As an added bonus these videos can also be embedded on bp powered site (if the admin wants this) to help its new users a long.

After these introduction videos you can get in depth and create more advanced tutorials and solutions for site owners. I think it would not make much sense to skip the basic BP fundamentals!