It does work! So you can now reference albums and tracks from https://open.audio/library in Mastodon via their url and get an embedded player for free!
(it will land in Funkwhale 0.19, but it's already on the develop branch if you want to try it ;)
Why is this step necessary? mastodon.eliotberriot.com might not be the server where you are registered, so we need to redirect you to your home server first.
Don't have an account? You can sign up here