Tube Catcher is one of the easiest tools for watching videos online and converting existing videos into other file formats. The application enables a user to simply type in the URL of the video they would like to watch and the video is downloaded into the file format that is the most beneficial. Users can also convert their personal videos into any format that they want.
And the best of all, it's a simple freeware application focused to individuals and students for personal, private and non-commercial purposes, this application allows you to download videos from social sites like XTube, Pornotube, Dailymotion, MySpace, Google, Yahoo, etc. 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) and or videos with adult content.