VideoContentItem

{
    "type": "text",
    "text": "string",
    "image_url": {
        "url": "https://YOUR_MEDIA_HOST/reference.mp4"
    },
    "audio_url": {
        "url": "https://YOUR_MEDIA_HOST/reference.mp4"
    },
    "video_url": {
        "url": "https://YOUR_MEDIA_HOST/reference.mp4"
    },
    "role": "string"
}