I couldn't find a video as requested, but I did find this tutorial. Hope this helps.
Apple’s backup software officially only works with supported devices, but with a little work you can trick it into backing up to any network drive!
four things to do:
Do these four things and your Mac will be backing up to your NAS or Windows share in no time, all the time.
This tutorial assumes you’ve got a working NAS you can access on your Mac, or that you’ve set up Windows to share files with your Mac.