Here's a good tutorial on the Flemish twist Talon, it's easier to show someone than on a video but this is the best we can do, and it's easy. The knack is keeping the twist nice and tight and even, it helps if you use a liberal coating of Beeswax on the skeins/strands as the wax helps the twists grip each other.
https://www.youtube.com/watch?v=DfyPOikbBvA
I make these for all my bows apart from my KG Osprey which is Carbon so uses a fastflight string. Remember it's a clockwise twist, but you are wrapping the skeins anti-clockwise around each other.