For Music, I've started using Navidrome on my server and Feishin on my desktop (a SubSonic server and client respectively). The music has all been tagged using Beets so there's a nice display.
For Video, I second the AppleTV 4K with Infuse app recommendation. Just accesses my library using NFS, and gets all the metadata from wherever to show an organised library, with a player that can handle anything.
The window is frosted, but if that mannequin ever comes to life, the neighbours will be treated to a suggestive silhouette.