The first in a new set of five stitches is a variation of the Herringbone Stitch. It is overstitched, or couched down, with Satin Stitch. As I have found no official name I will call it Satin Herringbone Stitch. Leave a comment if you know the real name, please.
I found it on You Tube, posted by Rose World.
First stitch a row of Herringbone Stitch.