I found Jim Turpin's video to be quite good, but Ron Ehlert's video on building the Chambers Long Rifle to be the best. In Ehlert's 3-disc dvd set, he goes into quite a bit of detail on several aspects of building the gun (takes the fear or apprehension out of building the gun).
Good luck to you when you get your first kit to work on. I am on my first one right now, (the video/dvd's) really did help.