Next come audience insights. You can't create video content useful to your audience without first researching who that audience is, what they care about and what their problems are. To discover what makes your target audience tick you'll need to go far beyond just demographics to qualitative data gathered from interviews and surveys. Finally, dividing your audience into marketing or buyer personas allows you to create even more relevant content tailored to their specific wants and needs.
Professional cameras, like DSLRs, give you fine control over the manual settings of shooting video and allow you to achieve the shallow depth of field (background out of focus) that people rave about. While they're primarily used for photography, DSLRs are incredibly small, work great in low light situations, and pair with a wide range of lenses — making them perfect for video. However, DSLRs do require some training (and additional purchases) of lenses.