The part I think is brill is when one of the penguins walks right up to the camera.
I was watching a David Attenborough documentary the other night. He's sitting on the snow, narrating - when a little penguin waddles down to where he is sitting. Penguin stops right at where he's sat, it looks at him for a bit, he turns and looks right at it, stops talking and then laughs as the penguin, having had a gander, then continues on it's merry way.
I rewound it again and again so cute & funny it was.