Chorus reports the amount of broadband data used per household doubled in 2015.
It’s called the Netflix effect and it is one reason why demand for UFB fibre services is running ahead of expectation. By one measure the number of people already connected to the part-built network has gone past the figure planners expected to see in 2020 after the network is complete.
If anything, New Zealanders are more in love with streaming video than overseas. I can’t find local numbers but they won’t be far different from those in this chart for North America.