CLEAN : New Zealand schoolkids claim world's biggest haka

The video discusses organizing a large-scale haka performance involving 7000 participants from 35 schools. The event aims to break a Guinness World Record, requiring detailed planning, procedural adherence, and verification by witnesses. The process includes counting groups and ensuring all participants perform for the required time. The event's success is observed and documented for submission to Guinness.

What is the requirement for each group performing the haka?

What role do witnesses play in the event?