File upload error using AmazonS3

Question

I'm trying to use the AmazonS3 service to host videos from my Drupal site. I'm using:

Drupal 7.16

AmazonS3 7.x-1.0-beta7

AWS SDK for PHP 7.x-5.4

Libraries 7.x-2.0

Video 7.x-2.8+3-dev

I've also downloaded the AWS SDK Library 1.5.15 which I've put in my libraries folder.

I configured the amazon module to use the bucket I had set up on Amazon and put in the correct access keys for AWS SDK. I then set up my video field to use AmazonS3, however every time I try to upload a file I get the error:

"The file could not be uploaded."

When I check the log files the error details are:

"The upload directory s3:// for the file field field_video_s3 could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled."

I have also set allow_url_fopen = On in my php.ini file.

Can anyone tell me if I am missing something? I have not added any special permissions or additional users to the Amazon bucket, and am not sure what permissions I would need to add if I do.

I would be grateful for any suggestions.

Ben