ScreamScapes.com has a lot of videos for Queue Line entertainment.
YouTube Channel: https://www.youtube.com/user/videoscreamscapes
You can also put Monster Trivia on your Facebook page. Use it to give away free tickets to your attraction. Tons of people will interact with your page to try to win. http://monstertrivia.net/
Check out Niles Scream Park in MI to see how well it works for them. https://www.facebook.com/nilesscreampark
Video Monster Trivia - 720p HD