Thank you for your in-depth analysis of that scene, but we're winning 2-1 at their ground 10 mins before the final whistle. Junior was just trying to kill some time while obiously having fun while doing it.
He is doing that dancing trick all the time, lol.
You know, when he receives the ball (usually close to a touchline, when his back is facing the stands and his face facing the opponent), then he stops running, then he is looking at defender.
Defender is looking at him.
They are looking eachother for a few seconds, lol.
Then Ney raises his right leg and stands on only one leg (the left one), and then he starts to "flirt" with a defender with his dancing right-leg moves.
He has done 100s of times of times during his career, both at 0:0, 0:5 and 5:0.
His "dancing leg"-move and dribbling backwards are two of his "trademark" silly moves.