The vision shows security guard Mick Gauci being approached at a Harbour Town chemist in front of customers and staff during an incident that took place in March.
Chemist manager Gema Hall said she was “shouting for help”, while others tried to step in to stop the situation.
Gauci said he had to go to hospital for a check-up following the incident.
“(I had) bruises and cuts to the back because I was pushed into a display,” he said.
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“A few bumps to the head from being kicked in the back of the head.”
Three teenagers were charged over the incident in late March, while a fourth was cautioned.
“I think everybody’s feeling unsafe in the community, unfortunately,” Hall said.
The situation comes as residents are turning to online platforms to get politicians to take notice of the state’s youth crime crisis.