Hi, Zoner1! Chapters are really only there to cut a long-ish video down into digestible "bite-size" portions! I've upgraded from PD7 to PD8 about a year ago and one of the first things I noticed was that I could bypass the editing stage and go straight to the create DVD stage and add clips(that might be of, say, 30-minute length) and, if I desired, add chapters to them! Effectively sub-chapters, if you like!(I could set chapters manually at points where I wanted them, or automatically in two options: chapters spaced evenly or a given number of chapters) The video would still be 30 minutes in length but the option I was then given was: 1 - start from menu and play all items sequentially, 2 - Start from first title then play all sequentially, and 3 - play the selected title only. The last option would return to menu after playing each title. This wasn't a feature of PD7 but now, with PD8 I have made good use of the feature, especially when each video is unrelated to the previous one(a video scrap-book, maybe!).
Cheers for now!