Secondary shots, used for visual interest and to smooth over transitions, are called material.

Video source material that's used to fill holes in the timeline where synchronized video is not included, or as a source of supplemented footage to accompany a video sound bite, visually supports what is happening on-screen. Video footage that supports the spoken narrative but that is not synchronized with it (e.g. an establishing shot of a scene that appears on screen while the narrator or reporter's voice introduces the story)

Secondary shots, used for visual interest and to smooth over transitions, are called B-roll material.

Further explanation:

In video production, B-roll footage is the secondary video motion pictures shot other than the primary (or A-roll) footage. It is regularly spliced together with the main footage to reinforce the tale, create dramatic tension, or in addition illustrate a factor.

The main types of B-Roll are as below:

The different ways to shoot B-roll are as follows:

Plan ahead: Make proper plan keeping in mind of main footage. Suppose, you are interviewing a subject inside a home then make sure about entrance footage and exit footage. Also, make a list of things that must be included to tell the complete story.

Get different angles: Make a list of variety of shots of same things with different angles. The shots must be with or without the subject so that it covers in case you need cutaways.

Scout Locations: Scout the location in ahead of time which you have planned so that you will get alternative footage since you might get good B-roll footage for a few minutes.

Shoot more than enough: Always, try to shoot more than your schedule so that you can edit the film if it is not strictly fall as per the required list.

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Answer details:

Grade: College Engineering

Subject: Computers and Technology

Chapter: Film Production and Technology

Keyword:

A-roll, B-roll, footage, main, alternative, schedule, list, plan, entrance, exit, dramatic tension, strictly, fall, scouts, locations, angles, subject, cutaways, pickup, stock, video