Well, it was worth a shot. But Viacom's "copyright claim" against my most recent upload, "Eric Cartman For President", has been upheld, as my counter-claim has been declined. As YouTube has told me: "After reviewing your dispute, B_Viacom has decided that their copyright claim is still valid." So, with that, "Eric Cartman For President" will not be returning to YouTube, and I do not plan to make another South Park animation ever again.
I will be continuing my current hiatus, pursuing other ventures and contemplating whether or not to continue creating and posting South Park-inspired content on DeviantArt, or anywhere. Maybe I'll come back; maybe I won't. I'll need to think it over.
Thank you for your support over the past 5 years.