视频（Videos）原厂火山格式
查询视频生成任务详情
根据任务 ID 查询单个视频生成任务的状态和结果。生成成功后返回视频下载 URL。
curl -X GET "https://jiniu.ai/api/v3/contents/generations/tasks/string"{
"id": "cgt-2026xxxx-xxxxx",
"model": "dreamina-seedance-2-0-260128",
"status": "succeeded",
"content": {
"video_url": "https://…（预签名直链，24 小时内有效）"
},
"resolution": "480p",
"duration": 5,
"ratio": "16:9",
"framespersecond": 24,
"usage": {
"completion_tokens": 50638,
"total_tokens": 50638
},
"created_at": 1787000000
}