Is it possible to use Apple's Earbuds/Headphones for audio in Quicktime?
A simple google search pulled this Apple document. According to this, your mac must be equipped to use the Mic and Remote for the Apple Earphones. A simple way to check is to go to System Preferences > Sound > Input.  If there is an "External microphone" listed in the Input tab, your computer can use the microphone included with Apple Earphones with Remote and Mic.