We've had a tough time getting Jack's talking sessions on camera. Chatting seems to be an interactive game for him, and he'll stop if we break eye contact. His chatting is not at all conducive to video -- as soon as we pull out a camera or change his position, he stops chatting.
Here, we managed to get a short clip of him cooing. Things rapidly moved into the "Mom! I'm hungry!" realm of Jack's vocabulary. Still, here are a few seconds: