CCTV footage of the devastating moment a man put his brother in a coma with a single punch has been released for the first time, with the brother responsible soon to learn if he will serve prison time. Downing Centre Local Court showed the security footage of the violent altercation between Irishman Barry Lyttle and his younger brother, Patrick, during a sentence hearing on Wednesday. Prosecutor Alex Poulos called for Barry, from Belfast in Ireland's north, to face a full-time jail term as it was the 'only appropriate sentence' after the violent incident in Sydney in January. Scroll down for video . After being pushed by Patrick Lyttle, his brother retaliates with a single punch (left) which causes his brother to fall to the ground, his head snapping back and body crumpling (right) Barry Lyttle has been charged with grievous bodily harm and has pleaded guilty to the charge . Magistrate Graeme Curran said a jail sentence was likely, explaining 'the issue is whether or not I suspend a prison term'. Barry could spend up to two years in a Sydney jail, despite his brother's calls for the charges to be dropped. On Thursday, security footage was shown for the first time, revealing the details of the distressing altercation outside Hugo's Lounge in Sydney's Potts Point when Patrick received a single blow to the head during an argument with his brother Barry. In court on Thursday, Patrick comforted his inconsolable brother as they watched the footage. Before the fight the brothers, who had only been reunited for a holiday in Australia for a matter of days, are seen chatting jovially and patting each other on the back affectionately. But after leaving the bar a fight escalated quickly. The court saw footage of the brothers standing nose-to-nose, exchanging some tense words. As Barry starts to walk away from the argument, Patrick pushes his big brother roughly. Patrick was treated by paramedics at the scene where he was found in a pool of blood and vomit on January 3 . Patrick Lyttle (middle) has called on charges against his brother Barry (left) to be dropped . The brothers from Belfast in Ireland (pictured here as children) went on a night out on January 3 in Kings Cross . Mr Lyttle pleaded guilty after the crown declined to downgrade the charge against him . The Irishman could learn his fate as soon as Thursday afternoon when the matter returns to court for a possible sentencing hearing . A split second later, Barry retaliates with a brutal punch to Patrick's head. It is a distressing scene as Patrick's head snaps back from the force of Barry's blow. His body buckles beneath him and he crumples to the ground, his head slamming against the pavement. As Patrick lies unresponsive on the ground, a clearly-distressed Barry immediately rushes to his brother's side, frantically trying to revive him. Patrick nearly lost his life after suffering traumatic head injuries. He was found by emergency services in a pool of blood and vomit, and remained in a coma at Sydney's St Vincent's Hospital for six days after the January 3 altercation. Patrick says he has since made a 'fantastic recovery.' Barry pleaded guilty to recklessly causing grievous bodily harm, whilst his brother called for the charges to be dismissed. Barry Lyttle (pictured left) has pleaded guilty to causing his brother Patrick (right) grievous bodily harm . The Lyttle family has previously said they believe the charge against Barry (centre) should be dropped . Patrick Lyttle (right) said he had made a 'fantastic recovery' On Thursday, Patrick delivered an impassioned victim's statement, pleading for Barry to be spared a prison sentence and for the family to be allowed to return to Ireland together to 'heal'. 'When my family is healed I will be healed,' Patrick Lyttle told the court. 'It has been an awful ordeal for me but everyone can see it has been for Barry too. 'Victims often want to see deterrence. But everyone can see how much my brother has suffered.' Patrick also pointed out their father Oliver's health has greatly suffered as a result of the trauma. Their father was in Australia with the two men on what had intended as a trip of a lifetime, but has become a nightmare. Barry Lyttle is pictured arriving at court with his brother, Patrick, and his girlfriend, Patricia last week . 'He doesn't want to go home without his two sons,' Patrick said. Patrick asked the court to consider allowing Barry to return to Ireland so the brothers can embark on a career in youth work, telling young people their story to warn of the dangers of violence. Barry's lawyer Chris Watson said his client was remorseful, unlikely to re-offend and of good character. The 33-year-old will be sentenced in Sydney's local court, where the maximum jail term is two years, rather than the district court, where people could face up to 10 years for that offence. Barry Lyttle's barrister Chris Watson said the punch was a 'very emotional, spur of the moment act' that immediately followed being aggressively attacked by his brother, and that Barry Lyttle had immediately shown 'an extreme level of contrition and remorse', according to the Sydney Morning Herald. Any animosity between the two has since gone and they walked from court together on Thursday, as they have done at earlier appearances. Barry will return to court for sentencing on April 24. Sorry we are not currently accepting comments on this article.
Footage has been released of the moment Barry Lyttle punched his brother .
Altercation left Barry's younger brother Patrick Lyttle fighting for his life .
Video shows Patrick pushing Barry and the latter retaliates with one punch .
Patrick's head snaps back before he falls and hits head against pavement .
It also shows a distressed Barry cradling brother while trying to revive him .
Prosecutor called for Barry to get jail time as Patrick pleaded to spare him .
Barry Lyttle, 33, has pleaded guilty to causing grievous bodily harm .
Incident between the two brothers happened on January 3 in King's Cross .