Police were called to a construction site in Bellevue Hill and found a 44-year-old man on the ground with injuries to his torso, outside the two-storey property around midday.
The new footage appears to be filmed from across the street and shows two tradies arguing and fighting on the roof.
One man then stumbles backwards and falls to the ground, while other tradies watch on.
The man was taken to St Vincent’s Hospital yesterday.
Two other men from the site, aged 41 and 45, were arrested and taken to Waverley Police Station where they were later released without any charges.