Check out this recent article from Cisco about how businesses are using video to improve internal communications, with quotes from Shave Media:

When faced with the choice of reading through long documents or watching a short video, employees almost always choose the later, says David Jackel, partner at Boston-based corporate video production company Shave Media. The company helped Genzyme create internal communications videos to explain important changes in the regulatory environment, as well as created a series of videos for Microsoft intended to communicate a unified sales message to several different business units.

“Video is a powerful tool for internal communications because it allows companies to engage with their entire organization through uniform messaging that’s much more compelling than an email,” says Jackel. “Recipients of internal communications videos are more likely to fully absorb the intended message than they would through more traditional media.”