The second and third options seem like answers to "How do you find movies you might want to watch?" The first and fourth seems like answers to "When presented with a movie, how do you decide if you want to watch it?" The current question, "How do you find/choose which movie(s) to watch?" is focused on the source. Personally, this comes up when i look for stuff to watch while exercising. The Netflix trial shows a ton of choices and deciding which one to watch bothers me more than it should. :)
Perhaps the question can be rewritten to be more inclusive?