Playlists and ItemLists

I was wondering what the latest thinking on playlists and itemlists are?

I was looking at this document from 2014 which is very interesting

https://docs.google.com/document/d/1WIQvnaAWCdcPn3AouznLELbLCcHqkGlttYREChVFycc/edit#heading=h.8v1ynjmzpofb

Another possibility was to use the Playback ontology but that may be a bit
complex

http://smiy.sourceforge.net/pbo/spec/playbackontology.html

My use case revolves around a library of Media Objects, they could be
audio, image, video etc.

Currently they are displayed by type of content, but I could imagine mixing
some audio tracks together with some video etc as part of a playlist
generated by a recommender engine

I've seen display position mentioned in the past
http://www.heppnetz.de/ontologies/goodrelations/v1#displayPosition


I'm looking for something simple and future proofed, something where I can
bookmark an item in the playlist and probably get the order.  Prev and Next
and nice to have, but not a must.

Anyone currently using schema.org for media libraries?