In this case it is a cowl knitted flat with a criss-cross pattern. It starts with a provisional cast-on and is finished by grafting in two-colour brioche.
The pattern PDF is 8 pages long and contains
- row-by-row pattern instructions
- chart of a pattern repeat
- photo tutorials for the techniques you need for this piece: the combined decrease-by-4-and-increase-by-4 stitch, provisional cast on (with crochet hook and scrap yarn), and grafting in two-colour brioche