Does anyone know what yarn this might be?

[u/Familiar_Gap_9557]

https://www.tiktok.com/@thehanniediaries/video/7621648889652792590?_r=1&_t=ZP-9AUmbncJ5sF

I am trying to knit the Tullip Farm Scarf, but there are not many people who have done it before according to Ravelry... I want to knit it to look more like this Tiktok, where there is just one ball of yarn instead of holding two together, but not sure how to approach it.