If you want to sync videos from iTunes to your iOS device, you generally connect the device, then click Movies in the Settings section of the sidebar, and then check or uncheck the movies you want to sync. Unfortunately, the sync interface presents movies by title only, and the titles can be truncated. You can’t sort by, say, date added, to see your most recent movies first.
This isn’t very practical, so I use a different technique. You can see just below the Movies section there is an Include Movies from Playlists section. What I do is use a special playlist for movies; in my case, it’s called iPad Movies.
When I want to sync a video, I add it to that playlist; when I want to remove a movie or TV show, I remove it from the playlist. Then, when I connect my iPad, iTunes syncs the video I want without me having to find them in the impractical interface.
You can do the same for TV shows; using a playlist makes it easier to select episodes, which require a lot of clicking in the standard interface.