Have you considered also releasing it to itch.io? (I don't do business with Steam due to DRM and their inaccessible website.)
I would happily purchase a NES ROM file so I could play it on my pitendo (RPi3 in a case that looks like an NES).
I'm not well versed in video editing. That said, the people I know who are tend to use Da Vinci Resolve.
https://store.steampowered.com/app/247080/Crypt_of_the_Necro...