A Panenka is a specific type of penalty through the center. It's a sort of chip/scoop shot and it goes really slow. It makes the keeper look foolish if it comes off. But it's slow enough that even a keeper diving to one side has a chance to recover, as seen in the video you shared.

But there's also the option of taking a normal run-up and blasting it straight down the middle. No keeper is going to be able read that since there's nothing to disguise. And if they dive, it's going too fast for the keeper to recover and save.

The keeper is biased toward action. If they just stand in the center and don't dive they'll be blamed for not even trying. So a hard, fast penalty down the center has pretty good odds of succeeding.