OK,
After searching for soooo long now, i finally found something that might work:
http://www.smovs.dk/blog/2011/03/12/boxee-running-on-appletv-through-a-vpn-to-access-bbc-iplayer/
trying this this evening.
Keep you guys posted.
Just use Tunlr 
Thanks for the tip, but that is not what i am looking for.
The reason is simple. Tunlr is just a DNS unblocking service
Because i live in Germany, it is illegal for me to watch even a TV Show or certain videoclips on Youtube. (f**king Sony!!) So tunir is out of the question.
But thanks for the reply!