I stumbled upon another free video downloader, TubeMaster Plus. TubeMaster Plus can download multimedia files such as FLV, MP3, MP4 and etc from *ALL* YouTube like websites and you can convert all these multimedia files to other popular video or audio formats such as AVI, MPEG, MP3, MP4, iPod, PSP, WMV and etc.
I have tried this freeware personally and you can use TubeMaster Plus with proxy authentication server if your office using one. Give this software a try because it is free of virus, adware or spyware today. Get it now and you will not regret.