Since part of a reason you have people donating money is either they believe in your story or mission or they want to be a part of what you are making. So getting a well known actor involved and utilizing him in any capacity would help you achieve your goal. Also placing your video pitch in well established sites can give you a leg up. Don't count on the people that already visit kickstarter.
I don't want to link-bait, but I did write a blog post about the best crowdfunding practices.
I think there is a few good steps.
- Find your best competitor. (how did they succeed)
- Where does your market exist online. (reddit, facebook, instagram, specific blogs, etc)
- Create a trailer & landing page and try getting press aimed at your specific audience.
- Launch the Kickstarter with hype & have a marketing plan + press ready. With those you could easily hit $20k.
Here's the blog link if it will be helpful.