Best way to embed a gallery of remote attachments in a page

Hi Everyone,

I’m working with a client right now on building a membership site powered by WP. One of the project requirements is that each lesson have a downloads section embedded in the page. This will usually just contain Video, Audio, and a PDF but some lessons will include additional files.

The client is hosting all of their downloads and media files on Amazon S3, so some of the plugins I’ve seen for building “attachment galleries” won’t work because they expect the attachments to be local.

I was wondering, how would you implement this? I’ve been considering adding a custom meta-box where the user can paste the S3 download url and then just coding the attachment gallery into the page template, but I was wondering if there is a more “native” way to do it. I hope that makes sense.

Thanks in advance for your insights!

– Greg