I agree with this guy’s point about more folks using video. Same with skype and google live video chat.

“As this behavior increases, it creates a whole new class of video content on the Web. The plus side for Facebook is that using the site to store and share videos for communication adds a new layer of utility for Facebook, in a way that is very appropriate for the platform. Still, the trend brings another big issue: if you thought YouTube had a hard time monetizing its video content, imagine trying to monetize someone’s personal video message to a friend.”