used to doing battle with each other in the living room, but on tuesday the supreme court, a cas case banded together some big rivals to battle a startup they say breaks long standing copyright rules. >> if a company like aereo can somehow provide content to lots of paying strangers without engaged in a public performance, i think the networks, at least some of them, will have to rethink the way that they provide content. >> reporter: aereo is a streaming service that uses thousands of small antennas to pick up signals of local television and then delivers them to smart phones, tablets and other devices to the internet. for $8 a month subscribers can watch what they want. they say they're a programmer. we're confident that the court understood that when a person watching over the air broadcast television in his or