Planet Purl's video demo of Jeny's Surprisingly Stretchy Bind Off-Good & slow demo, but only shows w/knit stitch, not purl.
Binding Off 1
slip slip knit elastic bind off
Invisible k1p1 bind-off tutorial #knitting
Crochet cast-off on a knitted item. Uses no extra yarn! Great for those times when there isn't enough for one more row. I wonder if this would be a tight bind off.
Stretchy Bind Off - Knitting
Tutorial for a great i-cord bind off. #knitting
3 Needle Bind-off knitting method