You think variations of this webcompents based player might work?
https://www.webcomponents.org/element/LRNWebComponents/a11y-media-player
https://lrnwebcomponents.github.io/a11y-media-player/components/a11y-media-player/demo/
If so, I think building out a customizable Libretime/Airtime player could be included in the project scope for most of the OpenProducer projects.