The argument of copyright infringement has been a hot-button topic since the moment you could record and share music and the like with your friends, family and strangers. Why the league tried to pull a fast one by not obtaining the appropriate licences to play the clips in question is beyond comprehension and who knows, it may have cost them less in the long run.
It's important to understand that during a lawsuit, anything can happen, and this case itself isn't necessarily as cut and dry as it may seem. What is puzzling is if all these teams and the league as a whole knew about what was happening, why wouldn't anyone have stepped forward to stop it?