I'm a firm believer that teachers should videotape themselves teaching and watch it every once in a while. It can be painful, even when the teaching is fabulous. But it's powerful.
That said, having someone else record me and my class and then having it posted for all to view is exceptionally scary. But also powerful.
If you are interested in how VoiceThread can look in a primary classroom, you can see us using it during a social studies lesson. I don't think it's the best example of VoiceThread, but the kids enjoyed it and we learned a lot together.