Content options on the Apple TV set-top box grew once again on Tuesday, as Apple added new channels for Yahoo Screen, as well as America's Public Broadcasting Service.

The new PBS channel on Apple TV gives users access to some of the network's shows, available to stream for free to their television set.

PBS is joined by Yahoo Screen, which includes content such as Saturday Night Live, The Colbert Report, and The Daily Show with Jon Stewart, as well as live news, events, music and original Yahoo programs.

The latest channels follow just weeks after Apple introduced the new iMovie Theater option on Apple TV, giving users the ability to view their iMovie-created content on their HDTV. Content served up by the device can be created in either iMovie for iOS or on a Mac.

Apple TV also added support for Major League Soccer and Disney Junior in an over-the-air update in September, while August saw the addition of Disney Channel and Disney XD. Other dedicated apps added throughout 2013 include Vevo, Weather Channel, Smithsonian Channel, HBO Go, WatchESPN, Sky News, CruncyRoll and Qello.