This 2023 presentation about video accessibility from the UW-IT Accessible Technology Webinar Series demonstrates captioning Zoom, Panopto, and YouTube videos and gives an overview of 3 approaches to audio captioning.
The video recording below is from the 2022 version of the presentation, and includes captions.
https://www.washington.edu/accesstech/get-involved/events/webinars/web20230308/