This video demonstrates the initial steps used to make the foundation half double crochet.
To make the first foundation half double crochet: 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 all lps on hook(see illustrations C and D-hdc completed).
First Foundation Half Double Crochet