One of the best softwares that allows for downloading from YouTube is KeepV. With this handy software, one is allowed the ability of conversion as well as batch downloading of any video from YouTube, all in a single click. With the help of KeepV Flash Converter, one is give the potential of converting flash format movies and files to a wide array of formats such as MP4 (PSP, IPOD), AVI (DivX), 3GP, MP3 (Audio only) and MOV (MAC). There is also support for lossless conversion of FLV to MPEG4.
The latest version of KeepV Flash Converter that is supported on Windows XP, Windows Vista and Windows 2000.