Kaizo Trap is an animated story about love, determination, and overcoming nearly impossible obstacles. Mostly that last thing. It pays tribute to ultra-difficult platformers like Kaizo Mario World and the speedrunners they inspire to achieve impressive results through brutal trial and error, as well as tool-assisted speedruns that make the impossible look easy. The title "Kaizo Trap" refers to a particular trope within these unfairly difficult games. Note: the first link has a photosensitivity warning and maybe more cartoon violence than you might expect. [more inside]
Super Mario Bros. Special occupies a strange place in Mario history. It's one of the few Mario games produced for a system other than Nintendo's own, licensed by Hudson Soft for the Japanese PC-8801 computer system. The system was fairly weak compared to an NES, so it didn't scroll; when Mario gets to the edge of the screen, it flips to the next. The game wasn't always designed with that in mind however, leading to a lot of blind jumps. You can play a hacked version of the original Super Mario Bros. designed to recreate this game using the patch found here. And here's a video playthrough of the whole game: World 1, World 2, World 3, World 4, World 5, World 6, World 7, World 8, Last level & ending. And here's a trap room in World 4.