I don't know how many of you are familiar with Matt Cutts, He is a google employee who writes a blog. All webmasters should read his blog, You may find him a little self important, some do (i don't), But face it, He's the closest we are going to get to looking at the google algo.

Matt cutts sometimes does a blog post where he asks webmasters to post general questions about google and he does his best (without giving too much away) to answer them.

This time around he got such a great response from webmasters asking question that he decided it would be best if he records the answers on video and uploads them rather than typing them out on his blog. You can see his answers post Here and the videos can be found here, Here and here

If you can't be bothered with all that kafufle you can find them all on My Blog (matt was nice enough to enable embeding)

Knew about this, but nice post

The length? Thery are about 6 minutes each, and he has done about 10 or 11 of them now.