How to make video and audio accessible

Avoid flashing visuals in your video.

Flashing visuals, like footage of a strobe light or lightening can cause people to have seizures or feel dizzy, nauseous or disorientated.

If you still want to include flashes in your video, you must:

• make sure that there aren't more than three flashes per second
• keep flashes small and make sure they have low colour contrast with other content

This helps reduce risk to viewers. For example, a clip with a scene involving very bright lightning flashes is edited so that the lightning only flashes three times in any one second period.

Web Content Accessibility Guidelines

This guidance may address the following WCAG guidelines:

• WCAG 2.3.1: Three Flashes or Below Threshold (W3C)
• WCAG 2.3.2: Three Flashes (W3C)