If you have Mozilla Firefox go to step 2 else read on
1. Download and install Mozilla Firefox from
http://www.getfirefox.com
2. Open Firefox
3. Click on Tools->Add-ons
4. Click the Get Extensions link in the window that opens
5. In the addons page that opens in your browser scroll down and you will see a list of popular extensions, in which VideoDownloader will be there. If not search for it in extensions search box at the top of the page.
6. Click on it, it will take you to the video downloader page, click on install now, and the plugin will get installed to your Firefox.
7. Restart Firefox.
8. Now in the bottom right of your browser you will see a new icon. When you point your mouse to it, it will say VideoDownloader.
9. Go to any YouTube or Google Video page. As an example, for fun, lets try
http://video.google.com/videoplay?do...55743675143177
10.As the video loads, single click the videodownloader icon in the bottom right of your firefox browser.
11.A pop up window will open. In that, if there are multiple entries, right click on the button which says .flv in the description and select copy link location
12.Open a new tab by pressing Ctrl and T, and paste this link you have copied and press Enter.
13.You will get a download dialog box as shown below.
14.Save the file. If you do not get a file with a .flv extension, and it appears as unknown file type, rename the file to something.flv
15.After you download the file use Media Player classic to watch the file. If you don't have media player classic see here
http://www.free-codecs.com/download/...Codec_Pack.htm
16.Use Freez Flv to Avi MPEG WMV converter in windows from
http://www.smallvideosoft.com/ or ffmpeg or KVideoEncoder in Linux to convert to DivX, XviD, or wmv
Enjoy! And let me know how you find this tutorial!