Don't believe your eyes

I've been wondering for quite a while how it is, that many of my favorite TV shows could afford to shoot some of their scenes on very remote locations. Especially when they only shoot 1 or 2 scenes in a place like Prague or the Himalayas. It's just too cost prohibitive to make sense - especially for television budgets.

I knew that 'green screen' technology was used widely in the industry (we even use it at Sportvision), but I was amazed when I watched this video - just how much it's used.