As we still can not find the way to stream YouTube video (
http://m.youtube.com) directly to WM device (without HCT Media Streaming Player). Therefore you can only manually download YouTube videos using
http://keepvid.com to .flv format then
playback with TCPMP.
However the best way to catch the latest obviously would be using RSS feeds.
YouTube offers several RSS feeds for categorized groups of videos (such as recently uploaded, top viewed etc) as well as customized feeds for users and tags.
I posted an article to explain how to aggregate and playback YouTube videos on WM device with RSS here:
http://solsie.com/how-to-aggregate-y...-on-wm-device/