Looks like there's a new option in iTunes 10.1 to share videos in iPhoto to Apple TV! In iTunes, click on "Advanced > Choose Photos to Share...". From there, you can now put a checkmark by "Include videos". I haven't actually tested this out yet but if it works that would be great. If you shoot video with a iPhone 4 you should be able to just sync the videos off with iPhoto and they should automatically show up on your Apple TV with Home Sharing. Right now, you have to do the extra step of importing the videos to iTunes. Can anyone test this?