A new tweak has appeared in Cydia called Air Home Video. For $0.99, this tweak will bypass the inability of AirPlay in iOS 4.2.1 to stream videos from your camera roll to your Apple TV. Apple really needs to fix this. Don’t forget AirVideoEnabler to stream other videos to your Apple TV.
Air Home Video will make sharing videos in your Camera Roll the way it should’ve been. You can trim videos down to only view portions and there are options for High/Low quality streams. It’s availabe now in the Big Boss repo.