Download the plugin here and you'll see what I mean:
I made it so that when you click on a channel, a dialog pops up telling you what server the stream is on.
Here is the debug log:
I noticed that every time I connect to the flash*.ustream.tv server, I get this error:
WARNING: RTMP_LIB::CRTMP::HandShake, client signiture does not match!
and the video plays for about 60s before ending. I also tried using rtmpdump/flvstreamer and I get the same results.