If you are using my scraper you can use the flags -gdb_img or -mame_img depending on what you are scraping
-gdb_img is for console games and defaults to just boxart but you can change to “s,b” to use the screenshot then fall back to boxart if there isn’t a screenshot
-mame_img is for mame and already defaults to the screenshot first.
you can use -help to see the other options