VeoFetchOperationResponse

{
    "name": "models/veo-3.1-generate-001/operations/6c9a2a6d-bbf9-40b8-aa3e-03270d2c7f51",
    "done": true,
    "response": {
        "@type": "type.googleapis.com/cloud.ai.large_models.vision.GenerateVideoResponse",
        "raiMediaFilteredCount": 0,
        "videos": [
            {
                "bytesBase64Encoded": "string",
                "encoding": "mp4"
            }
        ]
    },
    "error": {
        "message": "string"
    }
}