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