I'm a bit mystified by how media works in Hymnary. The wiki seems to offer little advice beyond some cryptic instructions that seem to assume other knowledge.
On the "Edit Media" page, what does the "Embed" option do? Also, what options change the media featured at the head of the text authority page? I uploaded a PDF media file for a hymn, and the featured sheet music on the text authority page disappeared. (If I recall correctly, it had shown an image with a link to a PDF sourced from The Cyber Hymnal.)
Thanks for any enlightenment you can offer.