Yes, you can. This isn't a service provided by api.video, but our player will show any caption styling that you add.

The basic process is to use a captioning service to caption your video. Then you open your .VTT file (caption file), and you can use WebVTT styling to move your captions, change their color, and more.

We have a tutorial about this here: https://api.video/blog/tutorials/how-to-edit-your-captions