I added an NES decoder to the NTSC emulation project ( https://github.com/LMP88959/NTSC-CRT ).
L. Spiro kindly implemented the filter in their NES emulator called BeesNES ( https://github.com/L-Spiro/BeesNES ).
This video is captured from their emulator with my NES NTSC filter on it.
The game being emulated is Castlevania 1987.