How to download/record youtube video in high quality

1.Download version 7.27 or higher of HiDownload and install.(Download immediately)

2.Run HiDownload, and open "Options" window

3.Select the "Stream Media -> Download youtube in high quality".

4.Open youtube.com, and copy the video's link: http://www.youtube.com/watch?v=VmCGljsvls8

5.Add the link to HiDownload, and download.