WCAG in Plain English

All images and other non-text content (like icons, charts, audio, CAPTCHAs, or controls) must have a descriptive text alternative that conveys their meaning. Purely decorative content can be hidden from assistive technologies (e.g. using an empty alt attribute).

Prerecorded audio-only content must have a text transcript. Prerecorded video-only content must have a text or audio description.

Prerecorded videos with audio must have synchronized captions that include; all speech; relevant sound effects (like music, alarms, or laughter).

Live video with audio must include real-time captions that cover; speech and; important sound effects (like music, alarms, or laughter).

All prerecorded videos with audio must include a sign language interpretation.

Live audio-only content must include a real-time text alternative, such as; captions, or live transcripts.

If audio plays automatically for more than 3 seconds, it must be possible to pause the audio, stop the audio, or adjust the volume, without using system-wide controls.

For prerecorded audio with speech, any background sound must be at least 20dB lower than the speech, or there must be a way to turn it off.