However, it doesn't all work right out of the box. Third-party apps will need to add support for AirPlay video, so expect a slew of updates over the next few weeks and months. And for Websites, not only will the video need to be in a format that iOS devices can play (read: H.264-encoded MPEG4 videos), but the video providers will have to explicitly define their videos as AirPlay compatible.

There is a workaround, however, if you install , which lets you flip on AirPlay support for video on any page. (It worked in my limited testing, though the quality of the video was not always good.)

For those third-party apps that have implemented support (the only app I own that had updated as of this writing was ), it works the same as with Apple's own built-in apps. When you start playing a video or a song, just tap the AirPlay control and select your Apple TV from the list. After a few seconds, the media should start playing there, but you'll be able to control it from your iOS device.

But because implementing AirPlay support is an opt-in choice, don't expect all of your video-based apps to flip the switch. Some, such as Netflix, have already said (the company cited redundancy, since the Apple TV already streams Netflix); others, such as Hulu, have shown in the past their reluctance to .

I ran into a few glitches and inconsistencies while trying out AirPlay support. For example, while you can AirPlay videos from the Photos app, you cannot do so if you access your photos and videos via the Camera app; that's especially irritating, as the Camera app conveniently lets you filter just your photos or just your videos, a feature not available in the Photos app. Also, though Air Video's AirPlay support worked fine on my iPhone 4, it didn't work at all on my iPad (toggling between the iPad and Apple TV changed nothing); that may be a problem for the developer to fix, however. Finally, you can AirPlay content being played from a shared library via Home Sharing (see above), but it only appears to work with audio at present.