This tackles both the retina and HTML5 video territory:
Do you know elegant ways to allow manual uploads of alternative file versions via panel?
E.g. for a HTML5 video you supply 2 versions, whereas only 1 “file” gets output with title, description, etc.
This also concerns retina image versions. Normally, I would just scale those via CMS, but we need to precisely optimise images; so a manual override should be possible at least.
So what’s the best way to link 2 files via panel? Simply via 2 identical directory structures, maybe with a feedback that a second file with the same name is available?
Another option that comes to my mind is linking 2 files via structures; but we’re likely talking 20 images per pages, so that would be some fiddling.
Could a structure field be auto-populated on upload? Or registered via hook?