At one point a blow fells the teenager to the ground.
The bruising encounter lasts around a minute and it was understood one of the boys suffered a hand injury.
A person who contacted the Herald claimed numerous teachers were on duty that day who turned a blind eye to the fight in the centre of the college.
A claim was also made the college did little about bullying and the students were not dealt with correctly.
But Hastie, who was aware of the video, said staff and senior teachers were quickly on the scene and defused the fight immediately.
He said it was disappointing but such fights were far from commonplace and both boys were dealt with swiftly.
"Fighting is not part of our culture and such behaviour is extremely rare," he said. "We view this isolated incident very seriously and as such have taken swift and appropriate action in accordance with policy and Ministry of Education guidelines to bring the individuals involved to account."
He said staff and students were shocked by the behaviour, which was competely foreign to school values.
"We are extremely disappointed that this one-off incident has the potential to damage our excellent reputation - a reputation that is built on respectful relationships among our more than 3200 students in an environment that is extremely safe and one where student well-being is paramount," said Hastie.