Version 1.2 of JK108's Ultimate PSPTube homebrew application is a modified version of PSPTube, which allows you to watch videos on your PSP.
This release now includes LiveLeak, as well as VBOx7. There are also some small improvements to video descriptions. As always, do make sure to read the readme first before doing any installation procedures. And you'd want to check it out too anyway cos the controls and tutorials on changing site order are there as well.