The iPad can send its display to a larger screen just like a computer can. But only certain apps take advantage of this feature. The Video app does so long as you are obeying the DRM rules.
It is a pain, but if the video has DRM it won‘t work usually. But if you have a home movie loaded or some DVD you have ripped, it should work.You will need the Dock-to-VGA adapter.
Other apps that allow for showing content trough the adapter are Netflix, Keynote and Photos. If you want to show off a web page, then get the Expedition app.
You can connect the iPad to your television. You'll need the Apple iPad Dock Connector to VGA Adapter, which connects to the 30-pin port on the iPad and to the VGA port on your HD.
"iPad Tips and Tricks : Show Movies On a Bigger Screen "
Reference : top-ipad-video-converter.com