curl --location --request GET 'https://ws.api.video/videos/vi4k0jvEUuaTdRAEjQ4Prklg/captions/en'
{
"default": false,
"src": "https://cdn.api.video/vod/vi3N6cDinStg3oBbN79GklWS/captions/en.vtt",
"srclang": "en",
"uri": "/videos/vi3N6cDinStg3oBbN79GklWS/captions/en"
}