Ben Dugdale is winemaker at Karikari Estate, New Zealand's most northerly. He showed me around the estate in December 2008 (see my report here) but I didn't have the bandwidth while travelling to upload this video of him in his Pinotage vineyard
In the video he talks about growing Pinotage and why he is planting some more. The berries are small and green because this was filmed in December. They'll be ready for harvesting soon.
Ben uses the following terms:
Veraison - that is when the grapes ripen and change colour to black
Brix - is a measurement of sugar in the grape. A finished wine will have an alcohol level a little over half the brix reading. So when Ben measures 24 brix thats teling him those grapes would produce 12.5-13% alcohol by volume.