The YouTube Remote app lets you control your computer/laptop/HTPC running Windows/Linux/Mac using your iPhone/iPod Touch/iPad over your WiFi network. Some of the main features are:
The YouTube Remote lets you use your iOS device as a Touch Pad Mouse or Air Mouse
YoutTube Remote has a QWERTY keyboard with function keys and a Numeric Keypad.
Browse YouTube videos, playlists and channels on the iPhone/iPad/iPod Touch and watch them on your computer connected to a TV or HD monitor. The ability to Queue videos ensures you can sit back and enjoy a continuous stream of videos. You can play back entire playlists of your favorite videos. A full-fledged YouTube remote allows you to control all aspects of the video you are watching from your iPhone/iPad/iPod Touch.