Trailers

English Trailers is a free site for English learners. They can comment on any trailer fostering the English language.

http://www.nowrunning.com/english/

E.g.

http://www.nowrunning.com/movie/7908/english/the-sorcerers-apprentice/4798/trailer.video.htm

There are websites where trailers can be seen with subtitles in English:

http://www.yourlocalcinema.com/subtitled.trailers.html

E.g.
http://www.yourlocalcinema.com/harrypotter7.html