AirPlay, Apple’s revamped version of AirTunes meant for streaming audio, video, and photos to compatible devices, may also allow for streaming of content from third-party applications, according to a new report. Citing testing done by a reader using the first iOS 4.2 beta, Mac Rumors reports that every application that uses the standard iOS audio/video playback interface now shows an AirPlay button for streaming. While the second-generation Apple TV, the only AirPlay device announced so far to accept video and photo streams in addition to audio, has yet to be released, a reader was successfully able to stream audio to an Airport Express from the following applications: Safari, YouTube, Netflix, Videos, iPod, BBC News, and MLB At Bat, suggesting that third-party apps may be able to stream video as well as audio to compatible devices. Notably, the software is still in beta, and as such the feature could be removed and/or tweaked prior to iOS 4.2’s public release.