The non-video tutorial is at http://www.jewelrylessons.com/tutorial/making-perfect-spirals-every-time
but one needs to register in order to have access to it.
This video is simply the images of the tutorial shown like a slideshow to music. It is adequate for the purpose.
The idea is brilliant but simple (and inspired by mosquito coils!). Make a half-loop (U-shaped hook) at the end of two different pieces of wire. Interlock the two hooks (possibly sticking with sticky tape on one side). Hold in pliers as for making a closed loop. Proceed as one would for a closed loop. Thus one gets two interlocking spirals, each one acting as a guide for the other. Thus, when finished, when one separates the spirals, each one will have a gap between its turns which is exactly the width of the other spiral's wire.
As I said: brilliant but simple.