Queensland's corruption watchdog has stood by a decision not to charge officers who allegedly bashed a man at a Gold Coast police station, but to punish the person who leaked the footage.

Twenty-one-year-old Noa Begic is the subject of a video that appears to show him being punched while handcuffed in the back of a police van in the basement of the Surfers Paradise station in 2012.

None of the four officers allegedly involved were charged, but whistleblower Sergeant Rick Flori faces seven years in jail.

The Crime and Corruption Commission (CCC) was called to review its involvement in the case after a complaint by the Queensland Council of Civil Liberties.

The CCC left Queensland Police's Ethical Standards Command to investigate, and now says it was only possible to substantiate allegations against two of the four officers.

The CCC’s statement says only one of them was ever considered for an assault charge.

Mr Begic received a payout and decided not pursue the alleged assault.

“It was [our] view at the time that without a statement from the victim in this case a criminal prosecution was unlikely to succeed,” the CCC said.

“On that basis, [we] did not raise concerns with the Queensland Police Service [QPS] about the decision to not commence a prosecution.”

It is understood that one of the two officers that could have allegations substantiated against them resigned, while other had a “sanction of dismissal” imposed on him.

That sanction was suspended on the condition that the officer goes two years without committing any acts of misconduct.

The CCC did determine that the suspension of sanctions by the service “has the potential to undermine public confidence in the QPS and the discipline system it administers.”