First rule of parenting: Give in right away or not at all. If it’s been long enough to type this post, you’re going to have to ignore the screaming for dessert until they fall asleep from exhaustion because if you give in now, all you’ve done is encourage tantrums.
Distract the kid, take em for a walk, talk to them in whispers until they quiet down enough to hear your and then tell them knock knock jokes.
Literally anything that’s not giving them dessert.
Just a reminder that even if the core work of the transcribing is done automatically now, being a media accessibility specialist who ensures the transcribing works and it is attached correctly, performs advocacy work for accessibility, and manages these systems, is a worthwhile job and will stay so for a long time.