Youtube Downloader HD is a free tool to download videos from YouTube and save it to your local computer. The videos can be converted to avi video format or to mp4 (compatible with iPod, iPhone). Now you can download High Quality videos, High Definition and Full HD videos from YouTube. Also Youtube Downloader HD is a Freeware!

Fearures:
Easy to use: just copy video URL from your web browser and paste to Youtube Downloader HD.
No need to use scripts or browser plug-ins.
Convert downloaded video to various formats.
Download Youtube High Definition videos (available on certain videos)
Unicode support: Youtube Downloader HD can save movies whose names have non-standard characters (like Chinese, Japanese, Cyrillic, etc.)
Support for big video files