A beaming Fury, who previously posed with mob boss Daniel Kinahan, is heard belting out Irish ballad The Galway Shawl at an outdoor picnic table in Manchester accompanied by other men as some children watch on.
Fury, whose grandfather hails from Co Galway, is filmed performing his take on the tune, most famously sung by The Dubliners, as his companions join in.
It's clearly a popular song with the boxer, who was also filmed performing it four years ago.
The boxer is a distant relative of singer Finbar Furey.
“Thanks for singing,” one tells him, shaking hands as another takes over the singing duties at the iconic Sinclair’s Oyster Bar in the city-centre.
Passers-by who spot the champion stop at the pub to grab a selfie with Fury and his friends in the background.
Although he appears to be enjoying his retirement there is growing speculation Fury could yet go back into the ring for another big-money fight.
His recent victory over Dillian Whyte was one of the biggest fights in the history of the sport in terms of spectators at Wembley Stadium and revenue from pay-per-view.
Promoter Eddie Hearn has predicted Fury will come out of retirement to face Anthony Joshua before the end of the year.
Last week Fury posted videos to show he was still training twice a day despite announcing his retirement after his victory over Whyte.
The Gypsy King said in his post-fight interview that he planned to stick to a promise he made to wife Paris by retiring from the sport.
"I think you'll see Joshua-Fury whatever happens, in all honesty," Hearn told his 1.2million Instagram followers on Tuesday.
"But hopefully we can see it for the undisputed world heavyweight championship in December."
Joshua was believed to have had a two-fight contract in place to face Fury in 2020 which is reported to have been brokered by Kinahan, but they never went ahead.
Fury’s tweet “Big shout out Dan, he got this done. Literally over the line. Two fight deal” in June 2020 is believed to have helped galvanise the international effort to crack down on Kinahan.
US promoter Bob Arum recently said he had paid the now-sanctioned Kinahan $4 million in fees over four other fights involving Fury in 2019 and 2020.
Fury has no involvement in crime.