Open on YouTube ↗Availability depends on the original video.

You can now send video from an iOS device to your Mac using a Mac app called AirPlayer. Just run AirPlayer on your Mac and your iOS device will see it as an Apple TV. You can use the AirPlay feature in iOS 4.2.1 to send video from the YouTube and Videos app. The current version of AirPlayer doesn’t send pictures or music using AirPlay, but hopefully this feature will be added soon because I would love to use my Macs as AirPlay speakers.