Keep Tube makes it easy to download movies from YouTube to your computer.
There are many ways to download shared videos on YouTube to your computer, but one of the common utilities is Keep Tube . This is an add-on for Firefox, there is also another version (bookmark bar) for IE, Chrome and other popular browsers.
Besides YouTube, Keep Tube can also work with CollegeHumor, Facebook, Google Video, Metecafe and many other websites. When you view and like a movie, click the Keep Tube icon (in Firefox) or on the bookmark bar. From there, you will be redirected to the homepage of Keep Tube to be able to download videos in various formats and sizes.
According to the experience of many users, you should choose the MP4 format because this format is not only high resolution but also easy to playback on the computer. YouTube's default FLV format requires a special playback utility, while MP4 can easily be played on DivX, QuickTime or any other popular multimedia utility. Even MP4 can be viewed easily on mobile phones.