Even though there are lots of tools available to download the videos from YouTube I tried and ended up with abortive. Finally after searching a lot found this TubeHunter Ultra from Neoretix Laboratory. This tool which downloads the video and music from YouTube converts them according to the users required formats. All downloaded videos can be converted by TubeHunter Ultra to other video formats including AVI, MPEG4, DivX, XviD, iPOD Video, iPhone format, MPEG, WMV, RM, MOV, Sony PSP, Zune Video, 3GP, 3G2, SWF, FLV, M4A, MP3, MP4, WAV, OGG, AAC and AC3. Not to worry about any spyware or adware for installing this tool, as it does not have any. The process of the downloading the videos is simple as shown below.
Step 1: Open Web Browser and specify the video page you want to download.
Step 2: Press F5 to refresh that web page.
TubeHunter Ultra will start downloading the video automatically.