battikh wrotevideo call doesn't make much sense, not many reasons to use it. if you want to show something to the other person, you can simply record the video and send it by email from your phone. if you need to have a conference call, simply use skype. but needing this on your cellphone on the go, the only use for it is sex chat.
Facial expressions and seing the other persons can make a difference.
Geeks typically do not care about these things, they have a very "functional" approach.
"Normal" people do not speak together only to exchange spoken information, they do so to exchange feelings which are hidden under the conversation. Seing the other person can help, when a physical meeting is not practical.
If that's wasnt the case, nobody would be using videoconferencing on skype.