Under the“Basic Info” tab select the“Tags” option and add the following code:
yt:cc=on
You may need to edit the auto-generated captions to create a new version for this to work. Go to
Creator Studio - video manager - subtitles/cc - auto generated - edit and make a change - save. This should generate another set of subtitles. Unpublished the auto generated version
If you’re working with a YouTube embed code for a website, you’ll need to add the following code inside to the end of the URL inside the iframe:
?cc_load_policy=1
As an example, the resulting embed code would look like this:
How to force closed captions to appear