Any way to add videos to iPad without iTunes?

Dropbox maybe?

First if you are just looking for a way to view videos on your iPad without streaming, you can in iTunes drag some videos from your computer, either iTunes library or other folders, to you iPad. In iTunes only some videos can be moved over depending on its resolution.

If you want more flexibility, go on to the App Store and search under "video players". You should be able to find a number of video players that will play a wider range of videos. On my iPod Touch I'm currently using Good Player, but there are others some of which are free. Note since the iOs device might be having to convert the resolution on the fly, these do seem to drain the battery faster. How you get the video to the player is dependent on the app. Some have a wifi interface you can access through Safari. Most you can put the videos into the app through iTunes by selecting your iPad. Then selecting the App page, and finally selecting the player at the bottom of the page. You can then drag the files into the app. Note this is all assuming iTunes interface is the same for the iPad as the iPod Touch.

Dropbox - put the video in your Dropbox folder on your computer, then download to iPad with the Dropbox app

Use Meteoric to download straight from a URL

Jailbreak and use a camera connector + USB stick or sd card + iFile if you want to store them on something like that