I think avoiding the power lines was the a factor and full flaps didn't help either.
However, I think the pilot was trying to rudder round the turn, repeatedly applying right rudder and left aileron.
Notice how the aircraft nods politely at 0:09 before the final aft elevator input ends the game.
I was always taught minimum 30 degrees of bank. That way you have less temptation to rudder round the turn and you get a rate of descent which is cured by levelling the wings rather than a spin.