Whole time airborne can't be much more than 10-15 seconds.
I wonder if that crane in the full video, on the right, was in the pilot's field of view and caused a distraction.
Centaurus, when learning to fly twins around 25 years ago myself and my peers were taught pitch up, power up, gear up, flap up, confirm, fix or feather. All of which could take precious seconds whilst effectively sitting in ground effect. The confirm was taught to me as dead leg, dead engine.