I've polled my teenage daughter several times over recent years about this. She barely _talks_ on the phone anymore - texting is FAR and away the most common form of communication. Even (facebook) chat is not used that often. I can't imagine video chat being compelling for her and her friends.
Whenever the topic of video chat turns up, I am reminded of an aside in Infinite Jest[0].
> WHY [VIDEOPHONY FAILED]
> The answer, in a kind of trivalent nutshell, is: (1) emotional stress, (2) physical vanity, (3) a certain queer kind of self-obliterating logic in the microeconomics of consumer high-tech.