Currently Being ModeratedJan 11, 2013 3:35 AM (in response to thomastv)
You'll need to use a third-party video player app on the iPad which handles multiple formats. My personal choice is CineXPlayer, but there are others.
Normally, to get videos into this app you use the iTunes File Sharing feature. However, to get the videos into this app without using iTunes, you'll need a third-party application running on your desktop computer, to copy the files into the Documents folder inside the app itself. For that I use "PhoneView": http://ecamm.com/mac/phoneview/ but again there are others such as TouchCopy.
Some third-party video player apps also let you transfer video files to them over a local WiFi network or downloaded via an internet web viewer.
So, what you want to do is certainly possible, but not as direct as you may have hoped.