Good points.

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?