Film is Duck You Sucker! (aka Once Upon a Time in the Revolution, aka A Fistful of Dynamite) by Sergei Leone
Available here on yourube (no subtitles sorry smh, it’s probably better to just torrent it ngl, but make sure you get the full uncut 157 minute version): https://m.youtube.com/watch?v=olU9APGKUC8
Some of us are more equal than others