Want to play random media from a network storage drive - no idea how to do it!

Hello.

I have successfully linked a Synology NAS to my HA setup via NFS.

This now shows up as a folder in the media section:

Brilliant.

What I want to do now though is access a specific folder which has video files, I then want to pick a random video, and play that media on a device.

How would I go about doing that? I found some old suggestions of using a folder sensor however I’m unsure if that’s outdated, or how to use that to access a network storage location.

Any ideas you have would be appreciated. Thanks.