This is a quick and unedited video example of how to handle the seam on a double crochet hat made in rounds. The same principle would apply to single crochet and half double crochet projects.
by Crafty PH
by Bella Coco
by MechaniFUN DIY
by Abbi Berta
by Shyam Diwani
by StoreeOfMyLife
by DisneyCarToys