I don't know that "advanced" could be bundled into a single class or session. At least if it was, you would have guys take both classes and expect to be advanced machine rebuilders, and that wouldn't be accurate IMO. The way Rickard presents scraping and machine rebuilding in first class is a fantastic introduction to the skill, but after that you need to go out and get your hands dirty. Rebuild a couple machines, scrape your own straight edges, etc. and then you start to find problems that you might struggle with or want help sorting out a process.
IMO scraping and machine rebuilding is remarkably simple, but the individual jobs might not present themselves that way. It's like any other machining operation: you look at the job and break it down into individual simple tasks and spend extra time measuring and knowing how it starts, how it moves, and how it ends. If you try to go faster than the materials and tools allow, you'll likely spoil the work and need to take more time correcting it. Knowing how it's been done before is often necessary as there are plenty of machines and jobs that really can only go one way to get the desired results, but the texts that Richard provides and recommends in the first class really cover 90% of the unknown. The rest you can pick his brain or that of others who have experience (Practical Machinist For-the-Win!). It's like any other trade. You have a basic certification or apprenticeship, then it's "How long have you been doing it?" and "What have you done?"
I think Richard doing more videos will be an excellent help as you can focus on the problem you are having and not worry about slowing down the rest of a class, but I wouldn't put it in a sequential class type format. After you do a first class, you could then go watch points on getting a dovetail right, scraping for 40 PPI (and where you should even bother), pit-fals of working on a surface grinder (or any other specific tool), how to print a surface larger than your straight edge, etc.