var config = {
  // Replace with your own bucket information
  Bucket: 'examplebucket-1250000000', /* Bucket (required) */
  Region: 'COS_REGION', /* Bucket region (required) */
};
cos.request({
    Bucket: config.Bucket,
    Region: config.Region,
    Method: 'GET',
    Key: 'test.mp4',  /* Media file in bucket (required) */
    Query: {
        'ci-process': 'videoinfo' /** Fixed value (required) */
    }
}, function (err, data) {
    console.log(err || data);
});

function(err, data) { ... }