Asking becous have no idea what is the best way to promoting movie trailer site. I know for sidereel, social bookmarks. Is any orther way?
He's right, post the trailers that get searched for the most often on YouTube and add your url in the resource box.
why not contact the movie companies and asked to be put on their PR list. i used to know someone who worked for a big movie house and they distributed lots of information which could give you an edge if you are quick enough off the mark. see if you can get a competition going...then you can populate the competition on loads of competitions and freebie sites? you can use youtube (fine line really as in theory you dont have permission to distribute the trailer), what you could think about is doing a few spoofs on trailers and upload them to youtube. just an idea.