From Opell Software:
Opell Youtube Video Converter can help you convert FLV video files from YouTube to any video (wmv, rm, rmvb, avi, 3gp, mp4, h264, mpg, mpeg4, DivX, Xvid, dat, mkv, asf, mov, m2ts, vob, etc) and audio (mp2, mp3, wma, wav, ra, m4a, aac, ac3, ogg, etc) formats. You can playback on almost any portable devices including iPod, iPhone, Archos, PSP, PS3, Xbox360, Zune, Wii, Blackberry, mobile phone, MP4 player, Creative Zen Player, HP iPaq, Pocket PC, and PDA. Version 2.2.4 upgraded MOV encoder core.
What's new in this version:
Version 2.2.4 upgraded MOV encoder core.