SC 1.2.2 Captions Recorded

Then 1.2.2 is about captions. This is again for pre-recorded videos. And here it is: "Captions are provided for pre-recorded audio content in synchronized media, except where the media alternative for text is available and is clearly labeled as such."

So basically, if you have a video with audio, synchronized media, then you can have either captions or you can have the alternative for time-based media, so the transcript.