I had this issue a couple years ago when I moved to a new host. I ended up having to manually import my WP instance, and I really don't want to do that again.
I am migrating my Wordpress instance to WP Engine. The import works in all ways except the "poster image" and "Media Embed" fields are flushed clean. Since I have thousands of posts, I can't have that happen.
Do I have to prep something before I move the site over?