why is it i type in www.youtube.com, and i get to;

http://de.youtube.com/

Perhaps you accidentally clicked German in the language selection box on the top right?

If so, clicking this link once should fix it for the next time, unless YouTube has some bug:
http://www.youtube.com/?locale=en_US&persist_locale=1

I think you're right. NO idea how I got routed into DE but now USA is back.