Media includes content such as pre-recorded and live audio and video.

General

Autoplay

Make sure that media does not autoplay.

Unexpected video and audio can be distracting and disruptive, especially for certain kinds of cognitive disability such as ADHD. Certain kinds of autoplaying video and animation can be a trigger for vestibular and seizure disorders.

Controls

Ensure that media controls use appropriate markup. Examples include making sure an audio mute button has a pressed toggle state when active, or that a volume slider uses <input type="range">.

Posibility to pause

Check to see that all media can be paused. Provide a global pause function on any media element. If the device has a keyboard, ensure that pressing the Space key can pause playback. Make sure you also don't interfere with the Space key's ability to scroll the page/view when not focusing on a form control.

Video

Captions

Confirm the presence of captions. Captions allow a person who cannot hear the audio content of a video to still understand its content.

https://www.w3.org/WAI/WCAG22/Understanding/captions-prerecorded.html

Remove seizure triggers

Certain kinds of strobing or flashing animations will trigger seizures.

https://www.w3.org/WAI/WCAG22/Understanding/three-flashes-or-below-threshold.html