Online support for VoiceThread can be found at: http://docs.voicethread.com/.
VoiceThread is a free application that works on any computer and web browser, and on most mobile devices.
VoiceThread bridges the gap between real-time discussions and standard video lectures or online presentations. This makes VoiceThread the platform for teaching, learning, training, and collaborating, on-demand.
You can read more about VoiceThread at http://voicethread.com/about/features/.