here are the revit architecture tutorial videos that already exist on the blog, however they are in a start to finish playlist. about 100mins long for anyone that wishes to watch them all in one go. if you need specific ones though, you can just head to this link;
For more REVIT 2011 videos I recommend checking out the series of DVD or download tutorials that the guys at infinite skills have put together. I have watched them, and am myself very impressed with the quality and professionalism of their work.