B-roll in practice
In an interview, the person speaking is the A-roll; the images of their workshop, their hands and the street outside are B-roll. Documentaries, corporate films and news depend on it. Editors always want more than was shot, so experienced directors plan B-roll in the shot list instead of hoping for spare time.
Where it lives in CrewDesk
A B-roll list in CrewDesk is a set of tasks on the project, so the director can see during the shoot which images are still missing.