WCAG 1.2.2 Captions (Prerecorded) is a Level A Success Criterion requiring captions for prerecorded synchronized media, unless it’s clearly labeled as a text alternative.
Testing Methods – Pre-recorded Captions

WCAG 1.2.2 Captions (Prerecorded) is a Level A Success Criterion requiring captions for prerecorded synchronized media, unless it’s clearly labeled as a text alternative.