has once again updated PSPTube today! PSPTube allows users with an active WiFi connection to watch YouTube videos directly on their PSP.
Download: PSPTube++ BETA for 12/24/2007
The new update reportedly adds support for the video files hosted on Veoh (another YouTube-esque video hosting service). Once again, be aware that this is not a 'stable' release and is considered highly experimental. Enjoy!