Some findings from today that may be helpful to others:
I was able to get KFC-008-2020122200 working well with latest spicetools and Asphyxia following advice elsewhere in this thread.
Some things worth noting / looking for any insight on the following:
Audio only works from main line out on my PC, I cant get any other method to work. Enabling Shared Mode WASAPI just makes sound not work at all.
I have to run in windowed mode, because when using full screen the video freezes completely - the game is still running but just frozen on some frame - if I alt tab away and back the frozen frame is 'updated' to whatever state the game was in that instant. What's odd is that this didn't happen the very first time I successfully ran the game. Due to this, only windowed mode is playable right now.
EDIT: As a follow-up re: #2 - if I switch my display to portrait the fullscreen issue does not occur.