@moveimgay Adylay did a good job with the timelapse. It looks like the technique used here is the upside down alpha. There's a detailed video attached to #33464. You can also make a regular using the same straight edge technique as for normal patterns. bf,f,f,f...fb bf,b,b,b...fb and so on.
Thank you @calezzi 😊 and thanks for the reply. It did look like silk thread. I also do kumihimo but because I use beads, I buy the thinnest macrame cord so it looks different from this one 🙂