It seems that he wants to make his movements clear to the audience, but in practice I would expect he is walking with short balanced steps.
I walk like you describe you do, but in the end I also developed calves like those you see on the folks in paintings from the 1400-1500s!
A parenting aside: I want to make sure that my daughter grows up walking the way she already naturally does, but it is hard to find good footwear for it in kids. The materials are all heavy relative to the size of the shoes and so it is hard to find a shoe that is both flexible and resistent to the weather. I'd love to hear any suggestions.