These are king penguins, also known as "the pussiest of all creatures." And when they fight, it is the greatest thing in the entire animal kingdom, because there is virtually no effort put into it at all. They just kind of stand around halfheartedly squawking at each other until one of them gets up the energy and motivation to swing a flipper. If it makes contact, so be it. It just bounces off with a soft, barely audible *pop*, while the other penguin looks on with a disinterested "How dare you?"
Pop, pop, pop, pop, pop.
The video is half a minute of that. Fins flopping all around, occasionally making contact. The soft pop of fin on chest, and then with exactly as much apathy, they all just decide that someone won and walk away. And if you really think about it, the world would be a much better place if all fights were conducted in this manner.