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Pretti’s family confirmed to CNN that he is the man seen in the video, while The News Movement also claims the BBC has verified the footage.
He was seen kicking and damaging the taillight of a federal vehicle as it drove away, before an agent exited the car and tackled him to the ground.
Several other agents also pinned Pretti to the ground during the clash.
The scuffle lasted only a few moments before he was released.
Pretti had been joined by a crowd of bystanders who were heard shouting at the agents as the incident unfolded.
The agents were then filmed deploying a smoke device before driving away from the scene.
The incident reportedly took place about three kilometres from where Pretti was shot dead by border agents on January 24.
The Department of Homeland Security (DHS) told CNN it is now reviewing the footage.
“A week before Alex was gunned down in the street – despite posing no threat to anyone – he was violently assaulted by a group of ICE agents,” attorney for the Pretti family Steve Schleicher told the outlet.
“Nothing that happened a full week before could possibly have justified Alex’s killing at the hands of ICE on Jan 24.”
Pretti was fatally gunned down by federal agents when he approached officers who were allegedly targeting a woman on a street on Sunday morning AEDT.
Officers tried to take Pretti into custody and he resisted, leading to a struggle, according to a notification to Congress obtained by The Associated Press.
During the struggle, a Border Patrol agent yelled, “He’s got a gun!” multiple times, the official said.
A Border Patrol officer and a CBP officer each fired Glock pistols, the notice said.
Pretti’s death, which followed the fatal shooting of female demonstrator Renee Good by an Immigration and Customs Enforcement (ICE) agent earlier this month, triggered outrage across the US.
The two US immigration officers involved in the deadly shooting have been placed on leave, officials said.
Democratic senators have demanded major changes to how US Immigration and Customs Enforcement agents operate as a partial government shutdown looms.
A partial shutdown is imminent over Democratic opposition to DHS funding.
Among the demands are forcing agents to have warrants for arrests, legislating the use of body cameras and banning masks.
“This madness, this terror must stop,” Senate Democratic leader Chuck Schumer said.
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