How to insert a post content into another post?

I plan to make a custom post type of “Libray” to host materials. Then, in other custom post types, I want to embed the materials from the Library. For example, in a post, there’s a input field of “Add a movie from Library”.

I think it’s similiar to the WP Media Manager which can manage materials globally and can provide content to individual post of any custom type.

How can I get this material inserted in another type of post?