The footage showed him hitting the dog repeatedly with a wooden broom, with such force it broke, crushed the dog against the ground and over the top of a wooden fence, hung him off the ground by a rope around his neck and swung him into a fence.
King could be heard crying and yelping, and was seen cowering in fear and repeatedly trying to escape from the attack.
King was surrendered to SPCA Tauranga Centre and was subsequently rehomed.
"The video footage obtained in this case shows a beating that is horrific in its intensity and duration, and is devastating to watch," said SPCA chief executive Andrea Midgen.
"Violence in communities must never be tolerated. Unfortunately, cases of violence against animals is something our SPCA Inspectors see all too often.
"Thanks to the work of SPCA, King has settled in beautifully with his new family, this cruel period firmly behind him."