For a thorough description of the sounds of German, please see one of my favorite websites: http://www.uiowa.edu/~acadtech/phonet... It has the sounds of German, Spanish and English explained in detail
This video shows some pronunciation practice recorded from my first year teaching. Yes, the board is a little disorganized - again, this was my very first year teaching! Also: the accent. We teach students different ways of pronouncing things, but oftentimes in order to overcome an American accent, we have to exaggerate certain sounds to make them more perceptible. I learned German in mostly northern Germany, and I usually teach students to at least be able to mimic the sounds I use, but I always allow students to pick which accents or regionalisms they want to use when they speak. This video is an example of ideas on how to use iMovie to create a short teaching demo, which we require of our graduate students. If I were to create a series on pronunciation, I'd do it a little differently.