This footage is from 27th December 2021 by Scuba Ventures - Kavieng, Papua New Guinea who said about the encounter 'Saw a new type of Jellyfish while diving today. It has cool markings and is a bit bigger than a soccer ball and they are quite fast swimming'
Wikipedia tells us 'Chirodectes is an incredibly rare genus of box jellyfish in the family Chirodropidae. It contains a single species. The first and only scientifically studied specimen was captured from Outer Barrier Reef, northeast Queensland, about 43km off the mainland on May 2, 1997'