The best way to record a game is to use the built-in INP. It basically records all your keystrokes, and then you play the game back using your input file. When zipped up, they're very small, but you can't use NVRAM or any kind of save state. That's what TG and MARP use for their MAME scores. The only bad part is, you have to have whatever version the INP file was done on to play it back (with a few exceptions...sometimes close versions might work, if nothing significant changed).
Anyway, I have another score. Don't have the screenshot handy, but it was 40K and some change. I did it while the site was blacked out, so I couldn't post it. Next time I have my laptop booted up and online, I'll upload the pic.