Decided on a simple solution, carry on with what I started with though reviewing CFA I just need to watch a tutorial to know what's safe to allow etc. Should I try audit only initially? I'll see what's blocked with default settings and try and work it out.
Anyway but convenience over excessive tweaking is proving to be a priority.
P.S. Added the consent.youtube.com to blocked cookies including 3rd party as described in the ghacks article
I've also amended the uBO My filters to the following to stop the Youtube Sign-in pop-up and Google Consent messages.
! Block insecure third-party content except stylesheet, image and media
! Google Consent / Sign-in
Things on the up and up with me in a lot of things in the coming months.