The team who operate the cameras at Scarborough Borough Council helped officers collect “significant” evidence, said Detective Superintendent Fran Naughton.
They also alerted police to people carrying knives in the area of Scarborough Town Hall gardens, where Mr Robinson lost his life in October 2019.
Four men - Dawid Goral, 21, Callon Brass, 22, Kieran Watkinson, 19, and Stevie Low, 23 - were found guilty of murdering the 26-year-old on Friday following a four-week trial.
A fifth man - 19-year-old Stefan Selvage - pleaded guilty to the charge before the trial started.
Speaking after the jury’s verdicts, Det Supt Naughton, who was the senior investigating officer in the case, said: “This was an appalling act of premeditated violence and our thoughts remain with Mr Robinson’s family as they attempt to come to terms with their devastating loss.
“I would like to praise them for behaving with nothing but dignity, despite the court proceedings being very distressing at times.”
She added: “After carrying out the brutal attack, the group fled the scene – leaving Mr Robinson for dead on the pavement.
"Their actions were cowardly and cold, and they have proven themselves to be dangerous individuals.”
As well as praising the CCTV operators, Det Supt Naughton thanked members of the public who helped.
“Thank you also to the many members of the public and witnesses who provided Mr Robinson with first aid in those first moments or provided information and evidence as part of the investigation,” she said.
Despite Mr Robinson having been killed by just one fatal blow delivered by Selvage, the Crown Prosecution Service pursued murder charges against all five defendants because they had plotted to kill the 26-year-old and were all at the scene when he was stabbed in an ambush-style attack.
The Scarborough Police chief said the jury’s verdicts were a salutary lesson that “just because you are not the one holding the weapon, it doesn’t make you any less responsible if damage is done because of it.”
Brass, of Eastborough, Goral, of Durham Street, Low, of Longwestgate, Watkinson, of Endcliff Crescent, and Selvage, of Colescliffe Road, have been remanded in custody until they are sentenced on February 19.