Synthesia: Generate AI B-roll of avatar actions

Synthesia Try it →Watch full video →Synthesia · Mar 2026

Demo summary

The user demonstrates using the media menu to describe a specific action—putting a suitcase in an overhead locker—which Synthesia then generates as a custom piece of B-roll.

Step-by-step

Select your avatar on the canvas
Open the media menu
Describe the action you want the avatar to perform in the text prompt
Click generate
Add the generated B-roll to your project

Highlights

“in just a few minutes, I have a bespoke piece of B-roll that I can add directly into my project”

All demos from “How to Convert Text to Video with AI in 5 Minutes”

0:360:51Generate a video from a text prompt in SynthesiaThe user demonstrates how to use the 'start with assistant' feature in Synthesia to paste a script from ChatGPT, select a template, and choose a visual style to generate a multi-scene video.Synthesia· Script To Video AI Generator
2:200:43Customize AI avatar outfits and brandingThe video shows how to select an avatar in the Synthesia editor and use a text prompt to generate a custom outfit, including adding a company logo to the character's clothing.Synthesia· AI Avatar Video Generator
3:030:15Change avatar location with text-to-sceneThe demonstrator shows how to change the background environment of an AI avatar by describing a new location in the scenes menu.Synthesia· AI Avatar Video Generator
3:270:21Generate AI B-roll of avatar actionsCurrentThe user demonstrates using the media menu to describe a specific action—putting a suitcase in an overhead locker—which Synthesia then generates as a custom piece of B-roll.Synthesia· AI Stock Video Generator
Watch “How to Convert Text to Video with AI in 5 Minutes” →

AI Stock Video Generator

3:270:21Generate AI B-roll of avatar actionsCurrentThe user demonstrates using the media menu to describe a specific action—putting a suitcase in an overhead locker—which Synthesia then generates as a custom piece of B-roll.Synthesia