The tube dishing tools can be easily made from various sizes of Schedule 40 pipe. That sweet little dishing hammer is now on my list of hammers to make. The tool used in the first segment is a monkey tool . Just a hole the size of your tenon drilled into a piece of bar stock. It should also have a small hole drilled in from the side to let out crud. While the maker was doing assembly he also used a rivet tool to be sure that his pieces were seated properly on the tenon. Scrolling pliers are fairly easy to make . Just small tongs with conical grippers. You can also modify a pair of cheap needle nose pliers.
Does that cover all of it?
Finnr