Aereo, the streaming TV service that launched last week in New York, has filed a second countersuit against companies that own stations in the market.

Reuters reports that the company, which is backed by former TV executive Barry Diller, filed a lawsuit in the U.S. District Court in Manhattan this week against News Corp’s Fox, the Public Broadcasting Service, Univision, as well as WPIX and WNET.

The lawsuit is similar to the one Aereo filed last week against CBS, ABC/Disney, and NBCU/Comcast, and comes in response to the companies’ claims of copyright infringement.

In both suits, Aereo is asking the court for a declaration that the streaming service does not infringe on the broadcasters’ copyrights.

Here’s a demo of how the Aereo service works…