I’m working in these days to plug-in contribution.
My idea is to make possible for users to upload audio and video files.
Anyone already worked at this problem?
I’ve searched in documentation to find information about the structure of plug.in without any result.
Can you send me any link or resource for this plug-in?
There’s written documentation for the Contribution plugin (link) and also a video (link).
Depending on what kind of media files you want contributors to upload, you might want to look at the site’s security settings (documentation) and consider reading the documentation on what media files are supported.