I just saw that there is now a cheaper plan available for Starlink owners in NZ, a deprioritized service for residential customers at one location.
Standard: 150-250 Mbps @ $159/Month
Deprioritized Standard: 50-100 Mbps @ $79/Month
Look like an interesting option for some people. My main usage of youtube is not too heavy so I think I'll probably give it a try