Does each synchronised time-based media have, if necessary, synchronised captions (excluding special cases)?

Referência WCAG

4.3.1

Does each pre-recorded synchronised time-based media meet, if necessary, one of these conditions (excluding special cases)?

The synchronised time-based media has captions.
There is an alternative version with captions accessible via an adjacent link or button.
4.3.2

For each pre-recorded synchronised time-based media with synchronised captions broadcast via a <track> tag, does the <track> tag have a kind="captions" attribute?
4.3.3

Does each live synchronised time-based media have synchronised captions where necessary (except in special cases)?