private static void Do()
        {
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse("DefaultEndpointsProtocol=https;AccountName=wtapocstorage;AccountKey=hpL+PSwgvcbxTM9mfjSxX3c0zeyitNmbTGNO29AK1Kzwz+wUg1I30gpr4s7tx1KCl1/Fjf/9Pi8ZNjh1KLLi/A==");

            // Create a new access policy for the account.
            SharedAccessBlobPolicy policy = new SharedAccessBlobPolicy()
            {
                Permissions = SharedAccessBlobPermissions.Read,
                SharedAccessExpiryTime = DateTime.UtcNow.AddHours(24),
            };

            var client = storageAccount.CreateCloudBlobClient();
            CloudBlobContainer container = client.GetContainerReference("asset-669ffb43-f058-4252-8fa5-5f0a9937bfde");
            var blobRef = container.GetBlobReference("test-video_480x272_400.mp4");
            var sig = blobRef.GetSharedAccessSignature(policy, null, null, null, new IPAddressOrRange("37.17.43.12"));
            Console.WriteLine(blobRef.Uri + sig);
        }