What editing software are you using? Anyway here’s some things I found that you might be helpful.
The easy way out (It’s easy and simple, but you’d be better off using an actual editor): http://www.starwars.com/games-apps/star-wars-crawl-creator
Sony Vegas Tutorial (This one was the only one I could find that was close enough to the real crawls): https://www.youtube.com/watch?v=n8AcG4LsGLQAfter
After Affects Tutorial: https://www.youtube.com/watch?v=uEjmfLd_9qw