aTube Catcher allows you to download videos from YouTube, XTube, Dailymotion, MySpace, Stage6, Google and export to many formats (MPG,AVI,MP4,3GP,3G2,WMV,PSP,MOV,FLV) with the quality that you choose, also has templates, so you can encode your videos to standard formats as DVD,VCD,IPOD,PSP, etc. Supports "Authentication" in YouTube, so you can download private videos (of course, if you have athorization)

Not only you can export the videos from YouTube, XTube, Dailymotion, MySpace, Stage6, Google, also you can convert/recode any video or FLV (downloaded from other site or with other software) to the mentioned formats. aTube Catcher also can download and encode any FLV if you provide it with the direct link.