We wrote and direct the script ourselves- this saved the MOST money. Most of the video firms we've contacted were lazy and didn't provide any assistance into sharing suggestions or helpful tips on how to make a good demo video. They also were very pushy with the fact that we should hire professional actors so as not to waste their time. While I can understand that professional actors will make your product look better, it really depends on your product. For us, because we were on Kickstarter- it only made sense that we didn't hire anyone so our video seemed more personal.
Kickstarter video (we also did a bonus skit on the bottom of the page, which was included in the prices mentioned above) : http://www.kickstarter.com/projects/imjonathanlee/persona-yo...