Hand Slapping Forehead!
Ummmm….I don’t think the poster is interested in authoring in Scenarist…Jeesh! Man! You must be a pretty slow author to do that work in 2 hours in Scenarist! Ha Ha!!!
Get any number of authoring programs and lay your videos along with chapter. This way, when the end user hit next or previous it will go to the next chapter. Which authoring tool are you using?