All of these questions can help determine what type of video you should make and where you should post it. For example, if your target audience is not familiar with your company, you probably want to make a video that focuses on brand awareness before producing an in-depth, product video. You'll also want to host your video on a site that already has a large reach, like YouTube.
With offline marketing, it's very difficult to tell how people are interacting with your brand before they have an interaction with a salesperson or make a purchase. With digital marketing, you can identify trends and patterns in people's behavior before they've reached the final stage in their buyer's journey, meaning you can make more informed decisions about how to attract them to your website right at the top of the marketing funnel.