Yes.. I used to work for a company that runs the advertisement boards in arenas and stadiums across the US. Every so often we'd hafta put up a green screen on the courtside or backstop advertisement boards so the national or regional networks (TNT, ESPN and ABC.. or the old Fox Sports Regional Nets) could overlay their national/local adverts over them. And this was 15 years ago. Currently in the states, the regional networks that show NBA basketball or baseball (like Bally Sports and Root Sports) also does this