The photo emerged in the wake of Newcastle's victory against United last month - where Osula struck the winner.
"I remember it well," Osula told Newcastle's official matchday programme ahead of their game with Bournemouth.
"There was a skills competition in Denmark. I won that and there were a few others in Scandinavia. They selected the best ones from there and brought everyone from around the world to come and prove your skills.
"There was dribbling, practices, and at the end of the day they voted and thought I was the winner which was a proud moment for me as well.
"They handed me the award at half-time of a game at Old Trafford, so it's a memory that lasts with me. It's funny that it came back (after scoring) against Manchester United.
"I was young, enjoying football. When you're young you just want to go to different football camps across the country and enjoy football with different people. It was just when I wasn't training in the summer.
"I was always wanted to be something when I was young. I'm sure for many people it's a dream to become something. That's what I keep pushing for and what I want to be in the future."