Without digging into the code and making changes, you can't. From the Wordpress codex
In WordPress, you can write either posts or pages. When you're writing a regular blog entry, you write a post. Posts automatically appear in reverse chronological order on your blog's home page
What you can do is assign posts to categories and then use a plugin like page2cat and display the categories on that page you wish to see. You can even make this page the landing page and have another page for another cateegory.
For example, you could set your landing page to only display posts in the category 'landing'. You could then have a page display the category 'trailers' and now any page you just want on the trailer page, assign to 'trailer' and make sure it is not in the 'landing' category. Anything you want on the home page would have teh category 'landing' checked off.