Obnoxious, but also NOT correct. As another poster pointed out baby talk does serve a purpose in language development, and is a pretty universal part of child rearing. It’s not some recent cultural phenomenon that’s holding people bad from their full potential (or whatever BS this person is trying to imply). Using big words or skipping the baby talk stage doesn’t lead to more rapid or better development.

That’s a good clip, well worth the very short time needed to watch it.