I will break the rule of 100% complete but i have a HUGE issue and a simple fix for it for your upcoming Videos and if you ever want to edit / reshoot your B2B course.
I am at M5 L2 P2, and I really get confused on the way you introduce the notes. The little picture of the neck should, in my opinion be mirrored. This way my brain doesnt get confused if i should go up the neck or down the neck, since my Bass neck and yours are on the same side. Now that might be just me and others dont have an issue with it but you might consider it and do some test Videos with mirrored Josh to see the response of other people.