the point of this video is the "hello?"

I read an article in a parenting magazine today about teaching your kids how to "be their own friend" and play by themselves [instead of with mom /dad all of the time]. It said that sometime around age 3 your kid should start using objects in an imaginative way and pretend to use them. The article also said that it was a good idea to let your child play by herself for a couple of minutes each day until she needed you to interact with her. Wow! We're way ahead of the game on this stuff. Zoe has always played with her stuffed animals, books, and toys by herself. Every morning she chats with her bunny & monkey when she wakes up.
"Pretending" to do stuff is now called "imaginative play". And "counting" is frequently called "mathematical interpretation and computation skills". Watching a puppet play an accordion is "musical diversity." It's tough to be a kid these days.