Auto-Playing Media

Auto-playing media begins to move or play sound without a direct play command. Examples include background videos, video ads that start as a page loads, animated banners, and automatically advancing visual stories. Autoplay can communicate a message quickly, but it can also distract people, consume bandwidth, or interfere with someone using assistive technology.

The presence of autoplay is not automatically a WCAG failure. The relevant conditions matter. Under WCAG 2.2 Success Criterion 1.4.2, audio that plays automatically for more than three seconds must have an appropriate independent pause, stop, or volume-control mechanism. Other criteria address moving and auto-updating content, including when people need a way to pause, stop, or hide it. Browser autoplay restrictions can also vary by platform and user settings; a media element that works on a designer's machine may behave differently elsewhere.

For marketing sites, the safer default is a clear poster image and an obvious play control. If ambient motion is justified, keep it nonessential, respect reduced-motion preferences where applicable, and test keyboard and mobile behavior. A promotional video should not obscure the quotation form or customer service details.