I think the next real gamechanger for this project will probably be "plopdown.video/share/xyz" links. You should be able to store a track pretty much anywhere

I think the next real gamechanger for this project will probably be "plopdown.video/share/xyz" links. You should be able to store a track pretty much anywhere (github gists, pastebin) then associate them with a video and share the setup via that link. If you don't have the extension installed, it would show a preview and will prompt you to install the extension before proceeding.