Apple team today released an update, iOS 4.2.2, for the second generation Apple TV devices. This software update will fix bugs and errors Apple TV devices. Along with this, Apple has brought some improvements in the new iOS 4.2.2 firmware.

Read the following change log to know more about Apple TV 2G update -
Audio
Addresses an issue in which audio is not output when playing some video content.Video playback
Addresses an issue in which video is not displayed when playing some content.Audio output setting
Adds an audio output setting for switching to 16-bit audio for compatibility with some TVs and AV receivers.Live FF/RW improvements
Improves the performance of fast-forwarding and rewinding live events.Movie description
Addresses an issue in which the description information is not displayed for some movies.YouTube video order
Addresses an issue in which YouTube subscription videos were not ordered by date.
For iPod Touch, iPhone and iPad users, Apple has released iOS 4.3.3 firmware update.
