Just getting approved to the forum, so apologies for the delay in responding to your post.
I think this is a very interesting way of using the brain. I appreciate how you've scaffolded the use with video, the powerpoint slides, and the help button - I think that will make it much easier for people to learn the technology.
I would consider using design to help support that even further. The dark blue background can make the web of links very dense and a bit overwhelming. I've been working on designing one of my brains for use by others, and it's pretty dense too. My approach is now to make the backgrounds very light - white, or the light blue theme, or some custom colors I'm playing with. That way the links are not as prominent at first glance, but show up nicely when a thought is activated.
The colored text is also hard to figure out why it is colored that way - maybe a guide to that too? Something like this: "Red links will provide you with more in-depth reading, yellow links to our press releases" or whatever. If the colors are not significant, I would consider drop them - it feels like they "should" mean something that way.
I have proposed a feature for the Brain that would let us predetermine a wander path - that would really help uses like this. It would also make presentations easier to control, as it would make it into something like a powerpoint show. But until then, would a pinned thought that had a "Read me" approach work? Something like a "where to start if you don't know where to start" list of suggested links? A "table of contents" might help people access the ideas in a way they may be more accustomed to.
Another possibility might be to have it begin in outline mode, which has that tree/branch pattern people are more familiar with from computer file architecture. Non-brain users will know what to do with that to get started.
I'd love to keep discussing about this. I'm using The Brain for my dissertation research, and will be running into a similar problem of sharing the data (once I ever get it done...) So I've been thinking about it alot.