This won't surprise you, but I have never heard my Dad use "baby talk" in my life. He speaks the same way to a tiny infant as he does to his doctoral candidates.
This video is quintessential Daddoo. This is how my Dad once played with his children, and how he currently plays with his grandchildren. It's the same way my Pops (my grandpa) talked with me, and anyone who knew him is not surprised in the least. It's sweet and endearing and perfect.
This one's a keeper. The video and the Daddoo.