What Are B-Rolls?
The term “B-roll” comes from the world of film where editors used to use an “A” and a “B” roll of identical footage, before the digital age changed everything. B-roll shots are similar to cutaways in that they help break up the static interview shots, but B-roll plays a more major role in telling a visual documentary story.
In other words. B-rolls are the seasoning to a video. it gives your video flavor. In a world where everyone is shooting videos now. You need something that will keep your audience drawn in.