Were you looking for some tutorials / info or accidental post?
I assume that @naijaping meant to link to this blog post by the same name: http://wpmu.org/are-you-ready-for-buddypress-1-5/ (it’s a nice post, by the way, and it might be considered for addition on the codex page @karmatosed)
Yes. i tried to post the Video here, but not showing and no way for me to edit. i love the presentation.
I liked the video too. Niche communities around the world will surely rejoice 
Where can I upgrade from BP 1.2.10 to 1.5? WP 3.2.1 shows me version of BP 1.2.10 only.
BuddyPress 1.5 has not been released in a stable version yet. We are in Release Candidate status. https://buddypress.org/2011/09/buddypress-1-5-release-candidate-1-and-buddypress-1-2-10/
https://codex.buddypress.org/releases/
