I'm not dddd but I have done this job quite a lot. It's basically correct. However, the threaded rod method won't work 9/10 times, especially not on vintage bikes with indented chainstays. Might be OK with a modern bike or one with oval non indent chainstays. In general, one side will bend more than the other.

In every LBS where I ever worked, we used the Park frame bending tools for any bending. Sides got tugged separately. Those same alignment tools are used to constantly check alignment and dropouts are done as the last step. You can use a wood beam like he shows, but I suspect if you placed it vertically like that it would dent the seat tube. Lay it flat.