Complex sentence: A pay digital terrestrial service was launched in 2012 by Igloo; this is a joint venture between Sky and TVNZ and provides Freeview UHF aerial channels along with eleven Sky channels.
Split into simpler sentences: A pay digital terrestrial service was launched in 2012 by Igloo. This is a joint venture between Sky and TVNZ and provides Freeview UHF aerial channels along with 11 Sky channels.