There is a help file, a project template and some pretty neat sample applications.
-> YouTubeNotifier is a sample that watches the activity streams of other YouTube users, so that you are always uptodate
-> A sample website shows you how to use AuthSub authentication
-> YouTubeUploader is a bulk uploader that uses the new ResumableUploader component to asynchronous upload several large video files
using multiple threads based on a provided CSV file. (Documentation: http://code.google.com/p/google-gdata/wiki/YouTubeUploader).
After installation, you should be able to open VS 2008, and just select the YouTube template to get started.
This SDK is no longer containing the source code. For this you need to enlist in the subversion depot:
http://code.google.com/p/google-gdata/source/browse/
If you are just interested in the new ResumableUploader, check out the code of the YouTubeUploader application, starting here:
To file bug reports, feature requests etc, please go here:
http://code.google.com/p/google-gdata/issues/list
Regards
Frank Mantek
Google