i recommend bigasoft youtube downloader pro
with it, anda can easily achieve:
Download YouTube video, musik video in HD 1080p/720p, 3D atau stand definition 360p/480p
Download video from all populer video sites like Facebook, google Videos, Metacafe, eHow, Vimeo, MTV, BBC, Dailymotion, etc.
One-step download and convert YouTube video and other online video to almost all populer video formats including MP4, AVI, MPG, WMV atau HD MP4 (H.264, Xvid), HD AVI (Xvid), DV, ProRes, 3GP, MOV, MKV, VOB, RMVB and etc
Fast download and convert YouTube video, musik video to all populer audio formats like M4A, WAV, WMA, AIFF, FLAC, AAC, MP3, AC3, OGG, RA, MP2 and etc.
Windows version at
link Mac version at
link Step oleh step guide on how to use it at
link