Just some information for everyone here...if you store the videos on your iPad, iPhone, or iPod and play them using AirPlay through your AppleTV, you don't have to use the device to control the videos. When playing through AirPlay, you can still use the AppleTV remote control to pause, play, and control the playing video. For that matter, the iPad, etc., doesn't even have to be in the same room.
Note this also works for playing videos through AirPlay from iTunes on your Mac or PC to the AppleTV, so your computer can still sit in your office and you can control the playback using the AppleTV remote. Pretty slick for a $99 device!