How to upload videos to S3 using ngcordova?

I have created an app where Im trying to capture a video and upload that video directly to AWS S3. Capturing the video takes place, but uploading is failing. Infact I don’t see any error messages on the phone screen even though I have alert messages.

Please find the sample code below my controller:

$scope.takePicture = function() {
var options = {
quality: 45,
targetWidth: 1000,
targetHeight: 1000,
destinationType: Camera.DestinationType.FILE_URI,
encodingType: Camera.EncodingType.JPEG,
sourceType: Camera.PictureSourceType.CAMERA,
};

        navigator.camera.getPicture(
            function (imageURI) {
                var fileName = "" + (new Date()).getTime() + ".jpg"; // consider a more reliable way to generate unique ids
                var s3URI = encodeURI("https://bucket_name.s3.amazonaws.com/"),
                    policyBase64 = "policy_base",
                    signature = "signature",
                    awsKey = 'AWS_Key',
                    acl = "public-read";

                  alert("imageURI: "+ imageURI+" fileName: "+fileName);
                    var deferred = $.Deferred(),
                        ft = new FileTransfer(),
                        options = new FileUploadOptions();

                    options.fileKey = "file";
                    options.fileName = fileName;
                    options.mimeType = "image/jpeg";
                    options.chunkedMode = false;
                    options.params = {
                        "key": fileName,
                        "AWSAccessKeyId": awsKey,
                        "acl": acl,
                        "policy": policyBase64,
                        "signature": signature,
                        "Content-Type": "image/jpeg"
                    };

                    $cordovaFileTransfer.upload(s3URI, imageURI, options).then(function(result) {
                        console.log("SUCCESS: " + JSON.stringify(result.response));
                    }, function(err) {
                        console.log("ERROR: " + JSON.stringify(err));
                    }, function (progress) {
                        // constant progress updates
                    });
            },
            function (message) {
                // We typically get here because the use canceled the photo operation. Fail silently.
            }, options);

        return false;

    };

Any help is greatly appreciated. thanks!