Woud you want to stream video from your Personal Computer (PC) to your iPad via wi-fi or internet access? could I do it?, Yes, you could do it easily. You can stream any video from your PC with Mac OS or Windows OS, and not just for iPad but you may stream any video to iPhone or Ipod Touch too (other portable Apple devices). Then the nexk question are how to do it?. You may stream video with Air Video Application.
You can get Air Video Application for free or buying it. But for free version, There are a limits to stream your video, in a while not find it for full version. You only pay for $ 2.99 to buy a full version. And the important thing, you have to download and install a free Air video server for Mac OS or Windows OS dependent on which is OS you have installed on your PC. After you did all (install app for your Apple portable devices as video viewer and Install Air Video server on your PC as video server), then you can enjoy stream video over a Wi-Fi network or Internet (including 3G) via Remote Access. It so easy, right?
Enjoy and have a nice day