Audio
Audio (stand-alone e.g. a podcast) is short with clear sound and is accessible.⚓
The audio is short, meaning it is up to three minutes long.
The sound is clear, meaning:
there are no background noises
diverse accents are acceptable, but they need to be clearly understood.
Accessible means that the audio has subtitles or a transcript (or at least contains the transcript as text, e.g. a button with popup next to the video that contains the transcript).