Power in details
By Creating Video Content for the audience you are providing them the option to understand a product/service on a level beyond text and pictures. An audience which understands better has asks less questions and results in a higher conversion rate as compared to an audience which understands the content in bits and pieces.
A successful social media post is the one which looks attractive, speaks about the idea and has the essence of the concept. Without either of them missing, the chances of a successful post run shorter.
The biggest use of having creatives designed and posted is the easy navigation for a user on any particular page.