This video demonstrates the initial steps used to make the foundation double crochet.
To make the first foundation double crochet stitch: Ch 2, yo, insert hook into 2nd ch from hook (see illustration A), yo, pull up lp, yo, pull through 1 lp on hook (see illustration B-ch-1 completed), [yo, pull through 2 lps on hook] twice (see illustrations C–E-dc completed).
First Foundation Double Crochet