Erica Sadun, a popular Jailbreak developer, has created a cool tweak for your Mac that will allow you to stream AirPlay videos from your device. You can watch video from your iPod library or YouTube and it works almost flawlessly. The app still need a few tweaks, no need to download anything on your iDevice. You just download AirPlayer from the link below and your iDevice will basically recognize it as an Apple TV and play to it. The video show within the AirPlayer app on the Mac so you can show your videos that you have on your device to whoever you want on your Macs screen. Follow the link below for the download.
Index of /ftp/Macintosh