Why Are There Closed Captions on my Facebook Live Video?
In April 2020, Facebook added automatic captioning to all live videos. As a result, closed captions appear on all videos when the sound is muted. If a person watching the video unmutes the video, the captions will disappear. People watching the video have the option to turn on captions at any time, even when the sound is on.
Disabling Automatic Captioning on Facebook
Currently, it's not possible to disable Facebook's automatic captioning directly in Switcher Studio. However, if you manage a Page, you can turn off the feature, as follows:
Go to Settings on your Page.
In the General tab, select Auto-Generated Captions.
Select Don’t auto-generate captions for uploaded videos.
Click Save Changes.
By disabling the feature, it will turn off auto-generated captions for Facebook Live videos posted to the Page.