Polyfest event director Theresa Howard said organisers were working with the police to identify the men.
"We've been confident and have the peace of mind knowing that the police have been able to handle situations that have occurred before they've escalated into anything more than that," Howard said.
"In terms of the video, we're not even sure if the people were associated or had earlier participated or visited the festival."
Howard said the organisers were taking the matter seriously.
"The behaviour is not acceptable at all with us, as festival organisers," she said.
The brawl broke out on Te Irirangi Drive near the intersection of Great South Rd and Cavendish Drive at about 4pm.
The video shows males wearing red and blue clothing - generally recognised as the colours of the opposing Crips and Bloods gangs - in a flurry of pushing, shoving and punching.
The brawl spills out onto the busy road and two people are pushed to the tar seal, the others kicking, stomping and leaping on them as the attack continues.
Then, just as quickly as it seemed to start, it finishes and all the males take off.
Police confirmed that they had received multiple calls via 111 about the incident.
"We appear to have had numerous calls about this incident and other general disorder/fighting outside Polyfest late yesterday afternoon/early evening," a spokeswoman said.
"Police attended to disperse the crowds.
"It doesn't look like any arrests were made following the particular incident in the video - I imagine they were long gone by the time we arrived."
