If you are looking for a video tutorial that will take your hair from frumpy to big and voluminous than this tutorial is the one you are looking for.
You can expect to hair that is likened to Tracee Ellis Ross, big and beautiful. Pretty much you will be curling your twists with individual curlers to create the effect. I was surprised to see it come together so simplistically.
It is a bit like a bantu knot out, however, the effect in my opinion is a little different in the way it hangs. Check out the video to see exactly how to do for yourself.