There is a difference in the way that you would talk with your colleague and in the way you would talk with your friend. These groups of people that you interact with in different manners are known as distinct audiences, and one must cater to them in specific manners to have successful communication. The same concept would then be applied to the video content that you create and the audience that would interact with it. All of them must have tailor-made strategies if you wish to market them successfully.
This successful and tailor-made strategy is only possible if you know the needs and interests of the audience that your content interacts with. But how does one go about trying to find these details with regards to their audience. What is most commonly done is that the audience that the video content is catered to is generalized and some common features are selected out, this might be the age-range, gender, etc., and then the marketing campaign for the content is used to target these features. While this could bring about the desired outcome, for more thorough targeting of the audience and to make the best of the budget spent on the marketing more detailed research is required to be done.