VDownloader will download Google, Youtube and Grinvi videos on your computer in avi or mpeg format (not flv)!
Run Vdownloader.exe and copy the url of the video you want to download. Click on Download button...
Install:
Just unzip ALL the files to a folder in your hard disk. Both vdownloader.exe and ffmpeg.exe must be in the same directory. Otherwise, videos wont be properly converted.