At the moment, there are a few ways you can add live captions in YouTube:
- Enable the YouTube channel experiment in Web Captioner. Then go to Channels page in Web Captioner, select the YouTube channel, and follow the instructions.
- If you're using OBS Studio, you could use the OBS Studio channel in Web Captioner to send closed captions to YouTube through OBS.
- Use YouTube's live automatic captions if this setting is available to you.