Apart from the episode trailers maybe it's possible to add "Sneak Peak" category? It will a) serve some people who like to watch sneak peaks; b) stop some other people from adding sneak peaks as separate "special" episodes.
Also it'll be great to have ability to add trailers not only for the episodes, but for the shows and seasons. Right now it's a common practice to link show trailer to the pilot episode and the season trailer to the first episode in season. But sometimes networks release separate trailers for show/pilot and season/first ep. Also, show trailer is a much better way to glance over the show, than just by reading the summary.
