Now google introducing Google Business YouTube channel.
On this channel, you can watch Fred Vallaeys, our AdWords Evangelist, discuss conversion tracking and bid management, learn the basics of ad quality, receive tips on how to brainstorm negative keywords, or view a webinar on the AdWords Conversion Optimizer.
In addition to videos on AdWords, the channel also features videos of other Google business solutions like Google Analytics and Website Optimizer. The videos are currently organized into different playlists by product and by topic.
http://adwords.blogspot.com/2008/02/...s-youtube.html