Here is a link to a Youtube video that shows step by step how to make a quilter's knot:
https://www.youtube.com/watch?v=T3AgGVnnsrM
The video seems long for something that takes about 5 seconds to do in actual practice. Also, I simply move my finger over the winds to hold them in place with my right hand and pull the needle through with my left. A minor difference; the knot is the same either way.