I have a couple of seasons of various shows backed up on my droid. The problem is, going through the gallery app to view the shows is cumbersome because it doesn't actually say what the video name is. Also, using Act 1 to search for the video file is not idea, as well. It lists all of the video files alphabetically. While this may not be a problem for movies, having 30+ episodes for a show gets very tedious when trying to search for my videos.
On my SD card I have my folders set up like so:
Video--> Name of series--> Season--> Episodes (Sadly, Act does not reflect this nested folder structure, and just clumps everything in one playlist.