I think I found the download for the scarf, but when I did it it was a 9 page information sheet and on the bottom I found this for the Brioche Stitch:
Even number of sts.
Row 1 (preparation row): *YO, sl1, k1; rep from *
Row 2: *YO, sl 1, k2 tog (slip-stitch and yo of previous row); rep from *
Omit first row, repeat Row 2 only
I am not sure if it will help you. I will also provide the link I have in the download:
Hope it helps some!