I've been in online videos before, but this certainly takes the cake both for length and content. You can view the full thing here.
It's nearly an hour long video, but there are a few sections you can skip while discussions are going on. (Or you could have those discussions with someone next to you.)
The audio quality is better than the video quality, but even so you may be adjusting your speakers frequently based on who in the room is talking.
Thanks to Brian Schwammlein for recording this! I'm inspired to try ustream myself sometime.