Great 🙂
I have also made a feature request which I already resolved, so from the upcoming release the text/vtt type is going to be supported by default.
If you don’t mind, I will close this topic soon and mark it as resolved, feel free to open another one if you have other questions or issues.
If you like the plugin and have not rated already, feel free to leave a rating on your codecanyon downloads page and on the wordpress plugin repository, it’s greatly appreciated.