Tech Open Air Berlin 2012 এর ফ্রি ভিডিও দেখুন

This is the official video about the TOA Berlin Festival 2012. 

From the early beginnings of having open town hall meet-ups for Berlin's entrepreneurial and creative communities to the crowdfunding and eventual event itself: This was one amazing ride!
We could not be more thankful to everybody who believed in this idea and supported us along the way.