Reminds me of the Little Prince: We are responsible for who we tame. 

Reddit comment:

I wonder if having a near death experience has shifted that penguin's entire reality. 

He goes back into the water to search for a mate and a colony because his genes tell him to. He arrives at some place with more of his kind, he finds a female and begins to acclimate to a new group. He eats, sleeps, fucks, spends time with them.

But he has evolved. He knows death. He understands life in a way that these other penguins cannot.

And so he returns to his large bipedal savior time and time again. It's where he belongs now.

100+ Reddit comments:

https://reddit.com/r/videos/comments/3rru4m/penguin_always_returns_from_the_sea_to_visit_man/