Does anyone know where this move is called?

In the two following videos, the instructor calls it "momentum spin" but I can't find anything for that. Unfortunately while her tutorials are amazing, I'm still struggling.

Does anyone know what it's called and know of any now tutorials for it?

https://www.instagram.com/reel/C-DJZXJOfQn/?igsh=MWZpYjI4MXRxMjZ3cw==

https://www.instagram.com/reel/DHqmOdxRJIg/?igsh=MXJuZmp1ajFicHp5

Thank you! I'm at my wit's and 8