I need a good example of a German accent?

My English cl is having a trial on human nature, and I'm Adolf Hitler on the defense side. My teacher told me most of the grade is based on how you perform your character, so I got to do good. I don't know what a German accent sounds, I need some audio clips (or audio/visual) probably coming from youtube that has Adolf speaking or just a German accent, maybe some tips on how to speak like a German will help as well. Also, any ideas for costume? Any help is appreciated thanks.