I guess you will need to load up the driver manually.
On my Win 10 Pro system I have a NVIDIA HD Audio driver which is installed as a program (you can see it in the add/remove programs list). You can also see it in device manager/sound video & game controllers.
There are also microsoft system audio controllers, assume those are loaded initially by the OS but not the NVIDIA one.
In my case drivers are located at: C:\NVIDIA\DisplayDriver\398.11\Win10_64\International\HDAudio
So yeah, you could run a script and/or a shortcut whatever to load it in the startup directory. More of what you're presumably already doing to load everything yet keep windows hidden.
That will point you in the right direction. Sorry for being vague, talking off the cuff. I'll watch the vid soon, sounds good.