How to embed private videos hosted on Amazon S3/Cloudfront?

Hello there,

I would like to know if anyone have tried using the signed url option provided by the new version of Amazon cloudfront.

I´ve read that "the idea is to generate the signed url at page load time with a short expiry. This way each user who loads the page gets a unique short lived URL they can access, if they share it, it will eventually expire limiting your exposure to hot-linking".

How may I add a dynamic expiring link? I know that this has more to do with how Amazon works than how JW Player works, but maybe someone can help me out because have made it through, or maybe have found a good n00b tutorial (I haven´t found any that explains how to use their services and this video player at once that I could actually understand).

Thanks in advance for any insight!
Rosamunda