This seems pretty esoteric, but the game ended up working for me, so here is what happened.
When I installed the game, the only way I could get it to work with severe stuttering and slow down was to "deactivate full screen optimization" in the compatibility tab and running the game in fullscreen. Despite trying several of the methods here, I never seemed to be able to get anywhere.
I uninstalled the game, updated my drivers, and set "run as administrator" for GOG Galaxy. The game still had the same issues as before, so I also tried setting affinity for the CPU cores. This time around, when I set the game to fullscreen and deactivated full screen optimization again, the videos would run smoothly, but the game would have issues with ghosting the cursor, not displaying certain UI elements properly, etc. Also, I can't say if CPU affinity was relevant at all, since afterward leaving it as normal still had the game running in the same manner.
Downloading dgvoodWIP again (http://dege.freeweb.hu
/) (latest version was 60 at the time of me posting this) I finally managed to get this to work. Worth noting that the config.exe of dgvood was identified as a virus, and I had to manuever around that in order to change some settings to remove the watermark and other stuff.
I would say the most relevant things for me would have to be driver updates and running galaxy as the admin, but I can't say for sure. I hope this can be helpful, at least to some of you guys.