For the last couple of months, Youtube has been spreading around its HD (High Definition) Video feature to come to users, including the choices for choosing to watch between normal mode and HD mode. Something that are missing at the Youtube website there is the video you can download in HD mode, to watch on your PC. KeepHD can help you to do that!
At KeepHD website, enter the Youtube video URL you would like to download in HD mode and then hit the download button. The website will then generates a few links that allows you to download videos in Flash FLV format, 3GP Format for mobile, MP4 format, High Definition 720p and 1080p quality.
KeepHD also has another way to download HD mode video from Youtube:
What you can do is to change
to watch high quality video on your PC.