Some people like to knit with double pointed knitted when they knit in the round , Others like to knit
with circular needles. We are lucky. We can choose what suits us best. I am knitting the baby blanket in the image on circular needles because it keeps the weight of the blanket off my hands and joints and so I can knit a big blanket very comfortably. That would be hard to achieve with straight needles. The video shows you how to knit in the round and make a hat. Like anything , you need to know the tricks and how to make it work for you.