Here baby is coaxed by papa into saying "bbbb", a sort of spitting sound she had been making gleefully right before the video. So it's mostly papa making this sound and in the middle a bit of her laugh, which is rather hard to get out! You will notice hubby's hair is radically different from the other video. Now he's more like Wentworth Miller in Prison Break season 3. Just to be clear, that's a compliment.