Bummer, YouTube finally gets around to launching a mobile version of their site that's free for anybody to use - http://m.youtube.com - and it won't work with Windows Mobile. As in, it won't work with the default Windows Media Player or even the fancypants CorePlayer. That's annoying. Look like you're still going to have to download that add-on to the venerable TCPMP to get your YouTube on.
Seriously, people, how hard can this really be?
The RTSP tested and working on Treo 700p phones. We don’t have it working on Windows Mobile devices yet as we have not yet found a 3GP player which supports RTSP (alas, CorePlayer won’t work).