I use xbvr to manage my library. There’s a guide on EroScripts on getting started too.
The main advantage is not needing to worry about file names. You associate a video, funscript, etc. with a scene in xbvr. These are presented through a lovely gallery interface in HereSphere. Funscripts are automatically sent to HereSphere and on to the Handy over wifi too. It’s fantastic.
xbvr does have password protection, but I’ve not used it so I can’t comment on its suitability for your needs.