B-roll

A secondary video footage shot outside of the primary (or A-roll) footage.

The term B-roll originates from the early days of film, when editors inserted supplemental footage, or B-roll, into the main footage, or A-roll, to hide visible lines where two pieces of film were joined. In modern film and video production, B-roll describes all of the footage that isn't the main action.

CashCarti: “We trap in the muh’fxckin’ b-roll.”