Ok, all right, you meant Radial Symmetry, with the Mask Tool.
Thanks for your video, but unfortunately you can NOT use Radial Symmetry here. A spring / spiral has only 1 turn - Radial Symmetry has at least 2 turns, so one too many.
The example in your video is useful for organic shapes, e.g. a vase or horns of animals. The normal mask brush is rather unsuitable for technical constructions, because it is very inaccurate when painting on and unfortunately you also have no precise straight edges.
As I said, try it out, try to paint a spiral with one turn on a slightly longer cylinder and extract.
I have tried such things with the mask and spirals in at least a hundred different ways and unfortunately nothing works reasonably.
