Actually, owh, especially with jerky movements, means, “I don’t want to play anymore. Bugger off. I’m sleepy.” But I’ve always found it’s easier to drink beer without a baby screaming the house down and making it’s mother nuts.
And in the same way not all beers taste the same, not every baby says owh exactly the same way, but as you’ll hear in the video they all say the same thing. You just have to listen for it.