You kfb in the cast on stitch, then also kfb in the second stitch in every row. Each row is k1, kfb, knit the rest of the sts. When a pattern says to increase or make a stitch in a stitch, it's always knit front and back. And it doesn't matter if the increase is at the beginning of a row, the middle or the end, it's done the same way. Look at the bar increase video, that's the one used in this pattern.