You can download this script for free under the GNU GENERAL PUBLIC LICENSE
Latest version available to is version
1.1.0 You can download the latest version below

youtubebrowser_v1.1.0.zip Changelog - 06 October 2008 (v1.1.0)
- Security fix
- Bug fix for removed videos
- Rewritten the XML HTTP Object creator
- Bug in getting the title through the function YoutubeGetLink()
- Added high quality streaming and downloading (if available)
- Users can now view the comments of a video
- 08 August 2008 (v1.0.4)
- Again changes on the YouTube website, a few fixes done
- Video tags didn't seem to work, fixed
- 27 July 2008 (v1.0.3)
- More changes on the YouTube website, a few small fixes done
- 19 July 2008 (v1.0.2)
- YouTube changed website, a few small fixes done
- 23 April 2008 (v1.0.1)
- When searching, it now automatically selects what you were looking for (Videos or username)
- fixed: Searching for multiple strings wouldn't show any results
- fixed: Some errors came up when nothings was found
- 19 April 2008 (v1.0)