i recommend bigasoft यूट्यूब downloader pro
with it, आप can easily achieve:
Download YouTube video, संगीत video in HD 1080p/720p, 3D या stand definition 360p/480p
Download video from all लोकप्रिय video sites like Facebook, गूगल Videos, Metacafe, eHow, Vimeo, MTV, BBC, Dailymotion, etc.
One-step download and convert YouTube वीडियो and other online video to almost all लोकप्रिय video formats including MP4, AVI, MPG, WMV या HD MP4 (H.264, Xvid), HD AVI (Xvid), DV, ProRes, 3GP, MOV, MKV, VOB, RMVB and etc
Fast download and convert YouTube video, संगीत video to all लोकप्रिय 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 द्वारा step guide on how to use it at
link