By Brian Stelter, CNN
Aereo is a streaming video service that costs $8 a month. It is a new way to watch and record shows on local television stations.
Now Aereo's legality is before the Supreme Court. Is it, as Aereo argues, a legal and innovative way for consumers to get more control over how they watch TV? Or is it what some of the country's biggest broadcast networks say - a business built on a blatant violation of copyright law?
How does it work? Using thousands of miniature TV antennas, Aereo scoops up the freely available signals of local stations. Then it delivers the signals to smart phones, tablets or computers via the Internet. Subscribers pick what to watch through a traditional on-screen guide. They can also record shows and stream them later.
Where is Aereo available? Aereo started in the New York City metropolitan area. It is now online in New York and 10 other markets, including Atlanta, Boston, Dallas, Detroit, and Miami.
Read more of Brian's article on CNN.com here.