Choosing Yarn Colors Tutorial - Great tutorial on how to choose yarn colors based on the color wheel. This is very helpful to remember when you're standing in the yarn store unsure of what colors to purchase.
Weaver’s knot tutorial - an important join to know. Very useful for knitters and crocheters. I actually use this knot to join thread on my serger but never thought to use it for knitting or crocheting.
How to crochet an i-cord.You can use i-cord in amigurumi, as trim, or even to make bag handles. It’s versatile and works up quickly. Video's: Crochet an i-cord (right-handed) AND Crochet an i-cord (left-handed)