How to cast off with picot = 3 increased stitches with 3 stitches in between, above a rib

In this DROPS video, we show you how to cast off with picot = 3 increased stitches with 3 cast-off stitches between each picot, above a rib of knit 1 twisted and purl 1.

BEFORE STARTING THE VIDEO: We have already worked a few cms of rib (knit 1 twisted and purl 1). The casting off is divisible by 5 + 1 stitches.

THE VIDEO SHOWS:
Knit 1. * Increase for picot: Insert the right needle between the 1st and 2nd stitch on the left needle, make 1 yarn over the right needle, pull the yarn over through the 1st and 2nd stitch, then place it on the left needle = 1 new stitch. Repeat this 2 more times = 3 new stitches. Then cast off as follows: Knit 1, pass the back stitch on the right needle over the front stitch (= 1 cast off stitch), repeat until 7 stitches have been cast off = 1 picot *.
Repeat from *-* until all stitches have been cast off.