As practice, try telling a story with your b-roll and planning out a shot sequence. For example, your subject might open a door from the hallway, walk into their office space, sit down at their desk, open their laptop, and begin typing. Seems simple, right? But a shot sequence showing this 10-second scenario might consist of six or more different b-roll clips.
Before launching any marketing campaign, it's important to determine your primary video goal. This could be to increase brand awareness, engagement, or even conversions for a free trial. It's crucial to pick out just one or two goals for each video. When you define more than that, your video will seem unfocused, making it difficult for viewers to determine what they should do next.
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.