Super Mitch Bros. 3 is a ROM hack of Super Mario Bros. 3 that is focused on difficulty and the usage of various quirks and mechanics of the SMB3 engine. Unlike something like Kaizo Mario 3, Super Mitch Bros. 3 focuses a little more on genuine difficulty and requires that the player combine puzzle-solving skills and knowledge of the SMB3 engine to beat its 20 levels.
Pixel and Tuffcracker here collaborate to beat the entire romhack in record time with the usage of a number of glitches that don't appear to have been taken into account by the romhacker.
The movie file and the YouTube encode includes author's commentary in the form of subtitles.