The German cast-on is very easy and is great when we need to knit a piece with a stretch edge. It's ideal for pieces that start at the hem or cuff like cuff-down socks, mittens, hat brims… and wherever else you think an stretch edge will look cool.
This method is very similar to the long-tail but to get the stretchier edge you need to twist in the opposite direction. At first it will look a little confusing but after a few stitches you will notice that it is quite simple.
Step by step:
As preparation, you need to make a slip knot and position the tail of the yarn towards your thumb, and the yarn coming out of the ball towards your index finger.
Check out the video where I show this step-by-step.