Don't want to spam, but here's just the degrain, I only did this small clip because the rest of the vid I don't really care about.
Using topazai nyx but with very high original detail retained (92), for a fairly minor degrain and just doing 2 passes of that. With the insanely strong film grain + w/e other filters, if you try to remove any significant amount of grain you'll just end up with a complete mess. I've tried with numerous of her other vids but the results are never really worth anything because there's just nothing left to save, the fine details don't exist.